How to Treat Cold Sores

If you have a cold sore – small blisters on the lip or around the mouth – you’re not alone. More than half of Americans ages 14 to 49 carry the virus that causes cold sores. The virus stays in the body even after the cold sores clear. If the virus reactivates, or wakes up, you could get cold sores.

Cold sores are different from canker sores, which are not caused by a virus and occur inside of your mouth. Cold sores may appear just once in a person’s lifetime or return again and again.

According to dermatologists from the American Academy of Dermatology (Academy), many things can trigger cold sores, including:

- Stress, fatigue or being run-down
- A cold, fever or flu
- Exposure to the sun
- Hormonal changes, such as during menstruation or pregnancy
- Trauma, such as shaving, cuts, dental work, or facial or cosmetic surgery

Although most cold sores heal on their own, there are many things you can do to help manage your symptoms. To treat cold sores at home, dermatologists recommend the following tips:

  1. Slow the outbreak: Burning, itching or tingling may be the first sign that a cold sore is coming. When cold sores appear, apply an over-the-counter antiviral cream or ointment. Although this isn’t always effective, doing this may help slow the reproduction of the virus and relieve symptoms. 
  2. Reduce pain: Consider taking ibuprofen or acetaminophen to help reduce pain.
  3. Avoid foods that contain acid. While you have a cold sore, avoid foods that contain acid, such as tomatoes and citrus fruits. These could irritate the skin and add to any pain. 
  4. Cool the sores: Place a cool, wet towel on the cold sores for about five to 10 minutes. Do this a few times daily to help reduce the redness and irritation.

Cold sores usually heal in a few days to a couple of weeks, however prescription oral antiviral medication may be helpful for shortening the episode if taken within the first 72 hours. If you get cold sores frequently, speak with a board-certified dermatologist, as this medication may also be used for prevention.

Unlike canker sores, cold sores are highly contagious. If you have a cold sore, dermatologists recommend avoiding intimate contact – such as kissing – and sharing cups, towels, razors, toothbrushes and any other objects that may have come in contact with your cold sores. This will help prevent the cold sores from spreading to another person.

© 2019 American Academy of Dermatology. All rights reserved. Reproduction or republication strictly prohibited without prior written permission. Use of these materials is subject to the legal notice and terms of use located at https://www.aad.org/about/legal

You Might Also Enjoy...

What is Mohs surgery?

Used to treat skin cancer, this surgery has a unique benefit. During surgery, the surgeon can see where the cancer stops. This isn’t possible with other types of treatment for skin cancer.

Should I get genetic testing for melanoma?

If you’re worried about getting melanoma, the most-serious skin cancer, you may be wondering whether you should have genetic testing. After all, genetic testing is now used find a person’s risk for many diseases.

Melanoma strikes men harder

Researchers have found yet another way that men and women differ. Melanoma, the most-serious skin cancer, affects the sexes differently.

Your best defense vs. another melanoma

If you’ve been treated for melanoma, you may never get another melanoma. Many people don’t. But it’s important to know that you have a greater risk of getting another one. Anyone who has had melanoma has this risk.

Skin Cancer Prevention

Follow these tips to protect your skin from the damaging effects of sun exposure and reduce your risk of skin cancer ...