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Doctor insights on: Can Antibiotics Cause Cold Sores

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Help! Can antibiotics cause cold sores?

Help! Can antibiotics cause cold sores?

No.: Cold sores (or herpes) is a virus that is transmitted from person to person contact. Once a person has it, it never goes away, but the sores can heal. It can be reactivated by sunlight, stress, sickness (colds, flu). If a person has an infection and takes antibiotics for it, it may seem as though the antibiotics caused the cold sores, but the infection probably triggered reactivation.

Dr. Heidi Fowler
1,043 Doctors shared insights

Cold Sore (Definition)

Also referred to as fever blisters, cold sores are small, painful fluid-filled blisters that are usually found around the lips. Cold sores are very contagious and can be spread by mouth to mouth contact and can spread to the genitalia and cause genital ...Read more


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Do antibiotics give you cold sores?

Do antibiotics give you cold sores?

No: Cold sores are caused by latent herpes simplex virus that persists in the trigeminal nerve ganglia traveling down the nerve fibers that supply the lips. They are not caused by taking antibiotics.

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Will taking a lot of antibiotics cause a cold sore?

Will taking a lot of antibiotics cause a cold sore?

I am doubtfull: That antibiotics would cause it. But the illness that you were being treated for could trigger it.

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Can you tell me how to cure my cold sores without having to use antibiotics or tea tree oil?

Can you tell me how to cure my cold sores without having to use antibiotics or tea tree oil?

Use ice cube: Cold sores caused by herpes virus are not really cured since the virus continues to reside in the nerve. Some anti-viral medications may help lessen the severity if used early. If you can feel the cold sore coming - prodromal sign - tingling sensation in the usual spot you get cold sores - you could apply an ice cube to that spot. It has been reported that this reduces the virus replication.

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Found out I have strep throat after er visit I was given antibiotics n steroids but 2 days in medication I have cold sores. Is this herpes?

Found out I have strep throat after er visit I was given antibiotics n steroids but 2 days in medication I have cold sores. Is this herpes?

Cold sores: You may have herpes simplex in addition to the strep. Illness or steroids may have allowed your immune system to weaken enough that it showed itself. Not unusual at all. Check in with your doctor for some medication for the cold sores and to follow up on the strep throat.

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I've had a cold sore for over 2 days it hurts I used a antibiotic but its not really improving?

I've had a cold sore for over 2 days it hurts I used a antibiotic but its not really improving?

Abreva, zovirax (acyclovir): It is best to treat with oral antiviral it will heal faster and will increase interval until next attack. Abreva will heal lesion one day faster but not prevent another attack. See doc for script.

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When I started Antibiotics, my cold sore went away. But then it came back. I use Antibiotics for infection in theeth. Why won't the cold sore go away?

When I started Antibiotics, my cold sore went away. But then it came back. I use Antibiotics for infection in theeth. Why won't the cold sore go away?

Cold Sore is Viral: A cold sore is viral in nature and not bacterial. Antibiotics will not resolve them. They go away in about a week and since most antibiotic treatments are also about a week long, the first sore just happened to resolve on its own around the same time you finished your antibiotics, but the antibiotics probably had nothing to do with it. Denavir (penciclovir) is a good topical medication for cold sores.

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My daughter scratched a mosquito bite which now looks like a cold sore with a scab in the middle. Does she need antibiotics? It's been about 2wks

My daughter scratched a mosquito bite which now looks like a cold sore with a scab in the middle. Does she need antibiotics? It's been about 2wks

Infected mosquito bi: Maybe a low grade infection. Try using neoporin ointment twice a day and cover with bandaid. It should improve. If gets worse, call your doctor for advice.

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I have a swollen/blocked gland under my chin and two cold sore. Should I see my gp and get an antibiotic?

I have a swollen/blocked gland under my chin and two cold sore. Should I see my gp and get an antibiotic?

Monitoring Centers: Lymphatic system absorbs/carries things too big to go into the arteries/veins like bacteria eaten by white cells and digested food. Lymph nodes "taste" the lymph for anything bad like bacteria/viruses/cancers, etc. When it detects a problem, it alerts the immune system and your body reacts. They enlarge in response to the inflammation they create when they react. They shrink when all is well.

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Nose rash+boils. How can I tell if it's strep, a cold sore or regular rash from blowing nose too much? Took antibiotics for strep a few months ago.

Nose rash+boils. How can I tell if it's strep, a cold sore or regular rash from blowing nose too much? Took antibiotics for strep a few months ago.

Irritation: A skin infection (cellulitis) around the nose and cheeks calls for prompt treatment with appropriate antibiotics as this is considered a dangerous infection. However if you have been blowing your nose and rubbing it often the area could simply be irritated from rubbing. If you have any doubt, get it checked by a physician.

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Red, sore, bumps that keep recurring. First occured on collar bones, now lower on chest. Antibiotics, bactroban, (mupirocin) anti-histamines&cold sore patches don't help?

Red, sore, bumps that keep recurring. First occured on collar bones, now lower on chest. Antibiotics, bactroban, (mupirocin) anti-histamines&cold sore patches don't help?

See dermatologist: I think it is time for you to consult a dermatologist who may do a biopsy of the lesion to look at the potential causes for your skin problem. Some times this may be from a drug you have been taking.

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What can cause consrant cold sores?

What can cause consrant cold sores?

Something else: Usually cold sores come and go...Maybe you have something else... I would suggest seeing an oral medicine specialist.

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Dr. Dinh Bui Dr. Bui
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Why causes multiple cold sores at once?

Dr. Dinh Bui Dr. Bui
1 doctor agreed:
Why causes multiple cold sores at once?

Herpetic lesion: Small, multiple cold sores is the cause of herpetic lesion, and should be treated with antiviral medication.

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What are the causes of cold sores and what can be done for it?

What are the causes of cold sores and what can be done for it?

Laser: Canker sores or aphatous ulcers have no know cause except they are triggered by trauma, stress, spicy, citrus food. Not everyone gets them though. They are recurring and even though there are some medication that help cut the cycle down from 14 days, I am a big proponent of laser treatment. Recent studies have shown laser treatment of the area can stop the pain immediately and cut the cycle

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Dr. John Leander Po
1,117 Doctors shared insights

Antibiotic (Definition)

An antibiotic is a medicine that slows, stops, or kills germs. The germs are usually bacteria causing an infection in a person, so the person uses antibiotics to help his body get ...Read more