Cold SoresNot what you're looking for? Show
What are cold sores?Cold sores are small blisters around the mouth. They are also called fever blisters. They are caused by the herpes simplex virus. The most common strain of the virus causing cold sores is herpes simplex virus 1. It can be spread by kissing or sharing eating utensils or even sharing towels. Herpes simplex is not curable. But may stay inactive for a long time. What causes cold sores?Cold sores are caused by the herpes simplex virus. Once this virus is in you, it can cause outbreaks of cold sores. Cold sore outbreaks are often triggered by exposure to hot sun, cold wind, a cold or other illness, a weak immune system, changing hormone levels, or even stress. What are the symptoms of cold sores?Some people don’t have any symptoms with the first attack. Others have flu-like symptoms and sores (ulcers) in and around the mouth. Symptoms may occur a bit differently in each person. These are the most common symptoms:
How are cold sores diagnosed?Your healthcare provider can often diagnose cold sores by looking at the sores. If the diagnosis is unclear, your provider may swab the sore and send it to the lab for examination. How are cold sores treated?Cold sores can’t be cured. But if symptoms are severe, treatment may help ease some symptoms. Treatment may include:
Cold sores take about 1 to 3 weeks to heal. The first time they appear, they can take up to 3 weeks to heal. But when cold sores return, they usually are less severe and take a week to heal if no medicines are used. Antiviral medicines may help, but they work best if started with early symptoms before a blister appears. Antivirals are usually not advised for otherwise healthy people. Always talk your healthcare provider or dentist if the sore doesn't heal or becomes worse as time passes. Can cold sores be prevented?If you have never had a cold sore, don't have skin-to-skin contact with someone who has an active cold sore. If you have had a cold sore, you may prevent or reduce the number of times they come back by finding out what triggers your outbreaks. Then stay away from that trigger. For instance, if sun exposure is a trigger, use sunscreen when in the sun. If you have outbreaks often, talk with your healthcare provider. Starting treatment as soon as you know you are getting a cold sore can help it heal faster. The long-term use of oral antiviral medicines may prevent cold sores, but the benefit is very small. This approach is usually used only for people who get frequent and painful cold sores. Antiviral medicines put on the sores don't help prevent them. Key points about cold sores
Next stepsTips to help you get the most from a visit to your healthcare provider:
Medical Reviewer: Michael Lehrer MD Medical Reviewer: Marianne Fraser MSN RN Medical Reviewer: Raymond Kent Turley BSN MSN RN © 2000-2022 The StayWell Company, LLC. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions. Not what you're looking for? What triggers a cold sore?What causes cold sores? Cold sores are caused by the herpes simplex virus. Once the herpes simplex virus is in you, it can cause outbreaks of cold sores. Cold sore outbreaks are often triggered by exposure to hot sun, cold wind, a cold or other illness, a weak immune system, or even stress.
Can a cold sore make you feel sick?About 80% of adults have had a cold sore at some point in their lives. The first time it happens is usually the worst. A person may get a fever or feel sick.
What does a cold sore look like to begin with?Within 48 hours, a cold sore blister may appear around your mouth or lips, though you can get them anywhere on your face, including around your nose. A cold sore results in a swollen lip as the blister develops. The blister may look like a group of small, fluid-filled bumps surrounded by red, swollen skin.
What causes Cold sores on lips?A cold sore is a group of tiny, painful blisters caused by the herpes simplex virus (HSV). They're also called fever blisters or herpes simplex labialis. Up to 90% of people around the world have at least one form of HSV. The symptoms are usually the most severe the first you time you get cold sores.
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