After a few days, a cold sore will drain or burst, leaving a red patch on the skin. [2] X Trustworthy Source MedlinePlus Collection of medical information sourced from the US National Library of Medicine Go to source Cold sores can have 1 or several fluid-filled bumps that are red around the base and ooze pus when they break. As the blisters burst and dry, they’ll likely look crusty. Along with a cold sore, you may experience a fever, body aches, fatigue, and enlarged lymph nodes.

Wash the rag or towel immediately after you use it or use a disposable towel. The herpes virus that causes cold sores is very contagious.

For example, you can use OTC Abreva to speed up the healing of your cold sore. After cleaning the affected area, simply dab the ointment onto the cold sore every 3-4 hours (up to 5 times per day) for up to 10 days. Similarly, Blistex and Herpecin can reduce your pain and prevent drying. If you experience a lot of discomfort, take acetaminophen to help with the pain. Apply a lip protectant before you go outside. It’s important to start applying them as soon as possible once you see a blister or feel one coming on.

These patches are available over-the-counter at any pharmacy.

It’s important to use your medication as soon as you feel tingling that might indicate an outbreak. See your doctor prior to your next outbreak to get a prescription for the medication you need. Your doctor might prescribe an oral antiviral medicine, such as Acyclovir or Valacyclovir. The brand names of Acyclovir include Zovirax and Sitavig.

If you’re worried about an item being contaminated, don’t share it.

In most cases, canker sores don’t have any other accompanying symptoms. They often heal in about 10 days. While cold sores usually develop on the lips, canker sores develop on the inside of the mouth. Blisters caused by burns can look similar, but with burns, you can typically identify an incident that caused the blister.

This will help dry out the blister but it can be painful. If it causes you unbearable pain, try a different treatment. Repeat this process every couple of hours until the blister is gone. As an alternative, eating a popsicle or sipping on cool liquids might help your sore feel better.

You can repeat this process daily to help get rid of your canker sore.

Acidic, salty, and spicy foods to avoid include, but are not limited to, tomatoes, citrus fruits, chili peppers, potato chips, and fruit juices. Try not to eat rough and crunchy foods, like crusty bread and hard crackers, as they can scratch the blister and cause pain. Eat soft, anti-inflammatory foods. When dealing with a canker sore you still need to eat, but it’s important to choose the right things. Foods that are both soft and anti-inflammatory, such as honey and yogurt, will not irritate the blister and may even aid in healing. [13] X Trustworthy Source Cleveland Clinic Educational website from one of the world’s leading hospitals Go to source

Medications that may be prescribed include fluocinonide gel (Lidex), anti-inflammatory amlexanox paste (Aphthasol), or chlorhexidine gluconate (Peridex) mouthwash.

The inside of your mouth is especially susceptible to minor burns that cause blisters because it has tender layers of tissue.

Continue to apply cold to the area until the pain is reduced. If the pain returns, feel free to apply something cold to the area again.

Follow the directions on the medicine bottle, making sure not to take more than is recommended in a 24 hour period.

If the blister is interfering with chewing, talking, or other daily activities, your doctor may recommend popping it.

Instead, eat foods that are cooling, soft, and bland, such as creamy foods like yogurt and cottage cheese. Being cautious with the blister in your mouth will help it heal quicker and will minimize the chance of the area becoming infected.

If possible, use this time to quit smoking.

Your doctor may prescribe you an antiseptic mouth wash, which will keep the area clean and will help eliminate any infection. Most minor burns inside the mouth do not require medical care. However, contact your doctor if you are concerned.