Can pregnancy trigger cold sores
Cold sores in pregnancy | Pregnancy Birth and Baby
Cold sores in pregnancy | Pregnancy Birth and Baby beginning of content6-minute read
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What is HSV?
If you or your partner has the virus that causes cold sores or genital herpes, you might be worried about what could happen when you're pregnant or have a new baby. Here's what you need to know about herpes simplex virus (HSV), and how to protect your baby from infection.
The herpes simplex virus is a very common virus carried by most people. Sometimes it causes cold sores or genital herpes.
Cold sores are blisters that form on the lips, around the mouth and nose. Genital herpes is blisters or sores around the genitals or anus. The blisters may form a crust after about 3 days. The sores go away by themselves within 2 weeks.
There are two main types of HSV:
- HSV-1 causes mostly cold sores on the face and lips, and sometimes on the genitals
- HSV-2 causes mostly genital herpes
Both viruses are transferred though contact of the skin, saliva or genitals, and the viruses stay in the body for life. The viruses do not always cause symptoms, so you can carry the virus without knowing it.
HSV-1 is very common, with about 8 in 10 Australians carrying it in their bloodstream. But only 1 in 3 people with the virus has ever had a cold sore. HSV-2 is less common.
It is common for women who have had cold sores in the past to experience an outbreak while pregnant.
What happens if I get cold sores or genital herpes during pregnancy?
Having the HSV virus does not affect your chance of becoming pregnant.
It is quite common for women to have a cold sore during their pregnancy, even if they haven’t had one for a long time. Cold sores should not affect your unborn baby. But they are infectious, so it’s a good idea to treat them.
Genital herpes should not affect the baby if you have your first outbreak or it comes back in the first 34 weeks. But it can be transferred to your baby during the birth, especially if it’s your first outbreak.
If you've ever had a cold sore or genital herpes and you become pregnant, or you develop these conditions during pregnancy, it's important to tell your doctor or midwife about it. Together you can make a plan for managing herpes during pregnancy and birth.
How is HSV treated during pregnancy or breastfeeding?
You can treat cold sores and genital herpes with:
- aciclovir cream, available from a pharmacist without prescription
- aciclovir or valaciclovir tablets, for which you need a prescription
These 'antiviral' drugs are known to be safe for pregnant and breastfeeding women and are effective most of the time.
Famciclovir tablets are not recommended to take during pregnancy. Speak to your doctor if the cold sore is severe.
How is genital herpes treated during pregnancy?
You should take acyclovir or valaciclovir tablets, as above.
If it's your first outbreak of genital herpes, your baby may be more at risk because you haven't had time to develop immune protection against the virus, which also helps protect the baby.
Some women experiencing an outbreak of genital herpes might be advised to have a caesarean. This would prevent the herpes virus passing from mother to baby during a vaginal birth. But most women in Australia with genital herpes do give birth safely to healthy babies vaginally.
It's often recommended that women who have ever had genital herpes take antiviral tablets prior to the birth, even if the herpes isn't active at the time.
Talk to your doctor or midwife about the best course of action for your situation.
How do I protect my baby from herpes?
Herpes can cause serious problems in a baby, such as infections to the eyes and throat, brain damage and even death.
A newborn baby can catch HSV-1 and HSV-2 from being kissed or touched by someone with cold sores, or during childbirth.
Fortunately, most babies born to women who carry the virus are not affected. But if you or your partner has a cold sore or genital herpes, talk to your doctor about keeping it under control during the pregnancy and after the birth. It is also important to treat these conditions aggressively while you are breastfeeding.
It's important to maintain strict hygiene habits when caring for a new baby if you, or anyone in close contact with the baby, have cold sores.
If you have cold sores, you should:
- cover cold sores when you're around the baby
- avoid kissing your baby until the sores are completely healed
- avoid touching the cold sores then touching your baby
- wash your hands thoroughly before touching your baby
What if I have a cold sore while breastfeeding?
If you have cold sores, it is safe to breastfeed your baby as long as the cold sores are not on the breast or nipple.
If they are, it may be wise to breastfeed from the unaffected nipple only until the lesions have cleared up. You would express and dispose of breastmilk from the affected nipple. Breastmilk itself doesn't contain the herpes virus but it can be contaminated through the skin lesions.
Talk to your doctor or midwife as soon as you notice any cold sores on your breast or nipple.
What happens if my baby gets herpes?
It is very important that herpes in a newborn is recognised and treated by a doctor in hospital immediately. Signs of herpes in a newborn include:
- blisters on the skin
- fever
- irritability
- tiredness
- lack of appetite
If you think your baby might have the herpes virus, don't wait to see if they get better — seek medical help. Tell medical staff if you or your partner carry the herpes virus.
Resource and Support
If you are worried about your baby, see a doctor or midwife, or take them to the hospital.
FIND A HEALTH SERVICE — The Service Finder can help you find doctors, pharmacies, hospitals and other health services.
If you're not sure what to do or want more information, you call Pregnancy Birth Baby on 1800 882 436 to speak with a maternal child nurse.
Sources:
Family Planning NSW (Genital herpes), The Royal Woman’s Hospital (Genital herpes), Mothersafe (Cold sores in pregnancy and breastfeeding), Queensland Government Health (Genital Herpes and Pregnancy), SA Health (Cold sores (herpes simplex type 1) - including symptoms, treatment and prevention), Safer Care Victoria (Herpes simplex virus in neonates)Learn more here about the development and quality assurance of healthdirect content.
Last reviewed: May 2021
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Need more information?
Genital Herpes (HSV) | Body Talk
Genital herpes is a common STI caused by the Herpes Simplex Virus (HSV). Find out all the facts about Genital Herpes here.
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Cold sores - Better Health Channel
Cold sores are blisters around the mouth and nose, caused by the herpes simplex virus.
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Cold sores overview - MyDr.com.au
A cold sore is a skin infection that is caused by the herpes simplex virus (HSV). Cold sores usually occur on or around the lips or nose and are very common. They have nothing to do with colds.
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Cold sores: self-care - MyDr.com.au
Cold sores are caused by the herpes simplex type 1 virus. Most people carry this virus in their bodies. Find out what products are available for cold sores.
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Cold sores | SA Health
Herpes simplex virus type 1 (HSV1) causes cold sores on the face or lips - it is spread by skin or mucous membrane contact with infected saliva
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Cold sore infections - MyDr.com.au
Find the answers to common questions about cold sores, irritating blisters which are caused by the herpes simplex type 1 virus and can be triggered by stress, fatigue or exposure to sunlight.
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Cold sores: children & teens | Raising Children Network
Cold sores are quite common in older children and teenagers. Cold sores usually clear up by themselves, but see your GP if you’re concerned.
Read more on raisingchildren.net.au website
Genital Herpes and Pregnancy
If you are pregnant and you get genital herpes, it is important to tell your midwife or obstetrician.
Read more on Queensland Health website
Genital herpes
Genital herpes is a sexually transmitted infection (STI) which shows as blisters or sores on the genitals. This is caused by the herpes simplex virus (HSV).
Read more on WA Health website
Genital herpes: what is it? - MyDr.com.au
Genital herpes is a viral infection characterised by outbreaks of blisters and sores around your genital area.
Read more on myDr website
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Affect on Baby and Safe Treatments
If you’ve ever had cold sores — those annoying, painful, tiny, fluid-filled blisters that usually form around your mouth and on your lips — you know how inconvenient they can be.
But also if you’ve ever had cold sores (and therefore already have the virus that causes them), did you know they can recur, especially when you’re under stress or are undergoing hormonal fluctuations?
Stress and hormonal changes. That sounds an awful lot like pregnancy.
Cold sores in pregnancy aren’t unheard of, and they don’t usually have any impact on your growing baby. So first, let out a deep sigh of relief. Next, read on — because there are still important things to know about cold sores if you’re expecting.
Cold sores are caused by a virus — the herpes simplex virus (HSV). Of the two types of HSV, cold sores are generally caused by HSV-1, whereas genital herpes is usually a result of exposure to HSV-2. There have been a few instances where HSV-1 sores have been found in the genitals and vice versa.
Once you’ve had a cold sore (oral herpes), the virus remains in your system for life — it’s just not active unless you have a current outbreak.
But when we say that stress and hormones can cause the virus to reactivate, it’s important to know that stress and hormones don’t cause the virus in the first place.
If you’ve never had HSV, you can only get it through contact with someone who has. When it comes to a first-time cold sore infection, this can happen via activities like:
- kissing
- sharing food or utensils
- using someone else’s ChapStick or lip gloss
- oral sex
Here’s the really good news: If you already have the virus that causes cold sores, and you have an outbreak of oral herpes during pregnancy, it’s most likely not going to have any impact on your growing baby.
Cold sores are a localized infection, usually around the mouth area. They don’t typically cross the placenta and reach your baby.
The highest risk scenario is if you get HSV for the first time during your third trimester of pregnancy.
When you get the virus for the first time, your body hasn’t developed any protective antibodies to it yet. And while HSV-1 is usually associated with oral herpes, it can cause a genital herpes outbreak, which can be dangerous to your baby — especially as they pass through the birth canal.
Birth-acquired herpes is serious. However, it’s a concern with genital rather than oral herpes. That being said, because the same virus can cause both, it’s important to talk to your OB about any cold sores during pregnancy.
The most common treatment for cold sores is docosanol (Abreva), an over-the-counter topical cream. But the Food and Drug Administration hasn’t evaluated it for safety in pregnancy.
While some research has determined that it’s “likely safe” during pregnancy, at least one pharmaceutical company that manufactures the drug warns against using it unless it’s definitely needed — which really means you need to check with your doctor. There may be other treatments you should try first.
If you’ve had herpes in the past, your doctor may recommend antivirals — like acyclovir or valacyclovir — starting at week 36 and continuing until delivery of your baby, even if you don’t have a current outbreak of lesions around the genital area. This helps prevent reactivation and spread of the virus to the genital area.
This precaution is because you shouldn’t expose your baby to herpes in the vaginal area during delivery.
Alternatively, your doctor may suggest a cesarean delivery, which avoids the birth canal altogether — something that’s especially important if you have a current outbreak of genital herpes.
Cold sores are highly contagious, despite the fact that they won’t affect your baby in the womb. If you have them after your baby is born, avoid kissing those adorable little cheeks or touching any sores and then touching your newborn without first washing your hands with soap.
In the extremely rare event that you have cold sores on either breast, avoid breastfeeding from that breast while you’re still contagious.
Your cold sores are contagious until they crust over, at which point they’ll start to heal.
If you do pass a cold sore infection on to your newborn, it’s known as neonatal herpes. While not as serious as the birth-acquired version, it can still cause serious complications in a baby who hasn’t yet developed a robust immune system.
The cold sore on your mouth is likely to be more of an annoyance to you than a serious risk to your developing baby, particularly in your first two trimesters of pregnancy and especially if you’ve had one before. But you should still let your OB know about it.
The virus that causes cold sores — usually HSV-1 — can also cause genital herpes, which is more of a risk to your pregnancy and growing little one.
If you have an outbreak in your third trimester — or if you acquire the virus for the first time in your third trimester — your doctor may want you to follow certain treatment or precautionary guidelines, like antivirals or a cesarean delivery.
Herpes, cytomegalovirus, Epstein-Barr virus in pregnancy
Expecting a baby is always stressful for the female body, which has to work hard for nine months. And during pregnancy, the expectant mother has a lot of reasons for unrest. Infection with any infectious disease causes serious consequences that negatively affect both the condition of the pregnant woman and the child. Let's consider these diseases in more detail.
Herpes
The concept of "herpes during pregnancy" is too broad and often becomes a cause for unreasonable panic among pregnant women who do not know what and in what cases a threat to their unborn child may appear. It is important for a pregnant woman to have information about all the features of this disease at different stages of pregnancy in order to contact a gynecologist in time and understand when there is really a danger to the fetus when a cold appears on the lips. nine0003
If a woman in an interesting position has a recurrent form of the virus, that is, she has already encountered it before pregnancy, almost any manifestation of herpes is not dangerous for the mother and child. A simple herpes virus can only be a threat during pregnancy if it is a primary infection, especially in the early stages, when all the internal organs of the baby are laid and, most dangerously, the neural tube. Only in the case of primary infection in the early stages of pregnancy, up to the second trimester, the virus poses a threat, as it can lead to missed pregnancy, miscarriage, and developmental abnormalities. However, this clinical situation is more likely to be an exception to the rule, because most women repeatedly experience herpes before pregnancy. nine0003
Cytomegalovirus
For a pregnant woman, the virus is dangerous during the primary infection during the expectation of a child. Infection from a sick person with an acute cytomegalovirus infection is the worst option for a pregnant woman, because due to the lack of antibodies in the blood, the virus easily crosses the placenta and has a negative effect on the fetus. According to statistics, infection of the fetus occurs in 40-50% of cases. The degree of adverse effect of the virus on the fetus depends on the duration of pregnancy. If the fetus is infected in early pregnancy, there is a high probability of spontaneous miscarriage or anomalies in the development of the child. If the infection happened at a later date, no fetal malformations are observed, but quite often polyhydramnios occurs during pregnancy, premature birth and the so-called "congenital cytomegaly" of the newborn are noted. Such children may have jaundice, enlarged liver and spleen, and anemia. nine0003
Eppstein-Barr virus
The Epstein-Barr virus predisposes to premature termination of pregnancy, fetal malnutrition, in newborn children causes damage to the nervous system, organs of vision, recurrent chroniosepsis, hepatopathy and respiratory distress syndrome. However, this virus provokes the listed pathologies only under certain conditions, in the presence of which during pregnancy it becomes dangerous. It is very bad if a pregnant woman has not previously encountered the Eppstein-Barr virus, which is why she does not have antibodies to this virus in her body. If there was still contact, and antibodies were found after treatment, then this is a good sign, because in this case there is nothing to be afraid of. This serves as evidence that if a woman's body is re-infected, it will cope with this dangerous disease on its own. This means that a pregnant woman will not have to take heavy and rather dangerous drugs for the development of the fetus. nine0003
THERE ARE CONTRAINDICATIONS. YOU NEED TO CONSULT WITH A SPECIALIST
The materials posted on this page are for informational purposes and are intended for educational purposes. Site visitors should not use them as medical advice. Determining the diagnosis and choosing a treatment method remains the exclusive prerogative of your doctor!
Genital herpes and pregnancy - Omega-Kyiv reference book
Genital herpes is a viral disease that is associated with damage to the mucous membranes of the genital organs. The disease has an incubation period of two to ten days, after which the first symptoms of genital herpes may appear. nine0003
The clinical picture of the course of the disease is characterized by a slight tingling in the area of the rash, redness. Soon bubbles filled with liquid appear. In this case, there is severe itching, burning, swelling. In rare cases, there may be fever, headaches.
After a few days, the blisters begin to burst, leading to the formation of small sores on the genitals. In this case, there may be increased pain during urination. Within 14 days, the sores heal, all symptoms of primary herpes disappear. nine0003
Further relapses of this disease are called secondary herpes and occur in a milder form. It should be remembered that treatment is only a set of measures aimed at eliminating the clinical manifestations of the virus. In this case, once it enters the body, the virus cannot be completely cured.
Particular attention should be paid to women who are planning a pregnancy or who are in a delicate situation. Indeed, in addition to sexual contact, the most likely way of contracting herpes is the transmission of the virus from mother to child during pregnancy or childbirth. nine0003
Genital herpes during pregnancy can cause miscarriage, fetal death, congenital malformations. Therefore, any manifestations of this disease should serve as a reason for a pregnant woman to visit the attending physician.
Primary genital herpes is especially dangerous. When infected with the primary form of the disease, the mother does not have antibodies - immunoglobulins G and M. This means that the virus can freely affect the fetus, leading to such consequences as:
- miscarriage;
- congenital malformations;
- child's brain damage;
- liver damage;
- miscarriage.
The probability of damage and pathology of the fetus in the primary form of the course of genital herpes is 75%. Therefore, if there are symptoms and signs of this disease in a pregnant woman, an additional ultrasound of the small pelvis can be performed, antiherpetic drugs can be taken, as well as delivery by caesarean section. nine0003
If a pregnant woman has a secondary form of genital herpes, that is, its recurrence, then the likelihood of serious complications is much lower. So, with a relapse in the fetus, congenital deformities or damage to internal organs are rarely observed, since antibodies are present in the mother's body, which protect the fetus from exposure to the virus.