Doctor insights on:
How Long Is A Fever Blister Contagious
Yes: Fever blisters/cold sores are most commonly caused by the hsv1 virus which is very common and found in most people. The virus is contagious and some people are simply more prone to getting the "fever blisters" than others. There are some meds, including topicals that help decrease the duration of the symptoms and provide some relief. Best wishes. ...Read moreSee 1 more doctor answer
2 yr old has HFMD. Started fri/sat. When will he stop being contagious? Fever gone, still has blisters on Wed. Ok for family event Saturday?
Hard to say: At 2, their general activities include mouthing toys and fingers and spreading saliva around their environment. Since HFV viruses can shed in the respiratory tract and saliva for 1-2 weeks after initial symptoms, so how and when they stop spreading the germ is difficult to say.It can persist for 4-6 weeks in the stool. ...Read more
I got a fever blister inside my mouth 10 days ago. It has since gone down & healed, but i was wondering if i'm contagious?
My bestfriend's bf gets lip blisters ever since he was a kid. He got them last in 2012 due to sun exposure, this time after a fever. Is it contagious?
7 hrs after fainting and vomiting, fever blisters appered on my chin. Can this still be related to my episode? Or herpes? And is this contagious?
Stress: "fever blisters" are caused by herpes simplex and are contagious. We are all exposed to herpes simplex at a young age. Some people continue to have outbreaks during stressful times and with exposure to the sun. Others may never have repeated outbreaks. Your body was stressed due to the vomiting and fainting episode you had. Thus, the outbreak of herpes simplex. Valtrex will treat this. ...Read more
If a fever blister on the roof of the mouth is gone, but the area is still tender is it still contagious?
Probably not: If no blister or vesicle is there, you are probably feeling the after effects of the lesion which should fade with time. ...Read more
If a child has Hand, Foot, Mouth Disease and has blisters that are still erupting, but no fever. Is he or she contagious or no?
Hand/foot/mouth: Generally, a person with hand, foot, and mouth disease is most contagious during the first week of illness. People can sometimes be contagious for days or weeks after symptoms go away. This is why people should always try to maintain good hygiene (e.g. handwashing) so they can minimize their chance of spreading or getting infections. ...Read more
My mother in law just had some dental work done and now she has a fever blister on her lip. Does this mean she has hsv-1 and is contagious?
Perhaps: If she had a previous history of hsv, then the stress of dental work can lead to a localized breakout. If it is hsv, then yes, she is contagious. Anytime there are active hsv lesions - oral or genital - then one is contagious. It's the fluid within the blister that contains the virus. ...Read moreSee 1 more doctor answer
How long is a fever contagious? I had 102 last night and now I have 99. I work with children...Is taking a rest day a good idea
Yes: Most viral illnesses are likely spreading live virus in the saliva and respiratory secretions for up to 24 hours after the fever stops. Good hand washing and wearing a mask can contain most of the spread, but a 24 hour period fever free is considered the best way to stop spread. If the issue were something like strep throat, treatment would need to be underway for 24 hrs before it was contained. ...Read more
Hand, Foot & Mouth: Hand, foot, and mouth disease usually starts with a fever, poor appetite, a vague feeling of being unwell (malaise), and sore throat. One or 2 days after fever starts, painful sores usually develop in the mouth (herpangina). They begin as small red spots that blister and that often become ulcers. The sores are often in the back of the mouth. A skin rash develops over 1 to 2 days. ...Read moreSee 1 more doctor answer
Bacteria: Typhoid is caused by a bacteria called salmonella typhi. It is common in under developed countries where clean potable water and good sewage systems are not available . Most us cases occur in those who have traveled and been exposed to contaminated food or water. Infected people excrete the bacteria in their stools for up to 3 months, so they are contagious until the diarrhea resolves. ...Read more
Depends on cause: Fevers caused by infectious diseases are usually contagious 24 hours after the end of fever, or 24 hours after the start of antibiotics if caused by a bacterial infection. However, not all fever is caused by infections. You can have other reasons for running a fever such as autoimmune diseases. And an illness doesn't mean you need to stop breastfeeding - it can protect your baby to breast feed. ...Read moreSee 1 more doctor answer
Let me help: The period when an infected person is contagious depends on the age and health of the person. Studies show that most healthy adults may be able to infect others from 1 day prior to becoming sick and for 5 days after they first develop symptoms. Some young children with weakened immune systems may be contagious for longer than a week. ...Read more
Not sure: Fever blisters or hsv i viral outbreaks can be shortened by immediate use of zovirax, (acyclovir) but if not taken before 48 or so hours into it, it will be of little benefit. I do not know the specific body clearance for the drug, but as it is dosed every 4 hours, i imagine it is cleared rapidly. Medication most helpful if you feel an outbreak coming on, waiting only reduces effectiveness. Good luck! ...Read more
Think my son has HFM. Never had a fever. Already scabbed up. A few blisters still. Going on day 6. How long will it last?
I started tamiflu (oseltamivir) 2 days, almost 3 days ago and I have no fever for 24 hours and i feel fine. Am i still contagious? If so, how long?
Up to 7 days: The shedding of the virus in your secretions peaks in the first 3 days of the illness but persists up to 7 days regardless of the use of tamiflu (oseltamivir). While the shedding diminishes as the fever drops, it can persist and the need for isolation depends on the situation. ...Read more
Hi! My 6 yr old was dx with HFM tonight. How long is she considered contagious? Until 24hrs fever-free?
If an adult has a cold with a slight fever and the fever is gone for 24 hours are they no longer contagious?
Usually: if you have no more symptoms you are likely no longer contagious ...Read more
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