Cold Sores (Fever Blisters)

Symptoms

A cluster of painful, small bumps or blisters on the outer lip
The small blisters often rupture and form 1 big sore (cold sore)
Present only on one side of the lip. It doesn't cross the midline.
Cold sores are a problem that recurs (called flare-ups). They recur in the same place each time.
An early sign of a sore is tingling or burning on the outer lip.

Cause

Cold sores are caused by the herpes simplex virus type 1. It is passed to another after contact with someone with an open lip sore.
Once infected, the virus stays in the body. It can cause cold sores to recur.
The sores come back because of different triggers. Some are sunburn, fever, colds, lip friction, lip injury, menstrual periods and stress. Cold sores usually start 2 to 3 days later.

Prevention of Spread to Others

Herpes from fever blisters can spread to others.
Help your child not to pick or rub the sore. Don't open the blisters. Wash the hands often.
Since the blisters are contagious, avoid kissing other people during this time. Avoid sharing drinking glasses or eating utensils.
If your child is young and puts everything in the mouth, avoid sharing toys. Do this for a week.
Avoid contact with anyone who has eczema or a weakened immune system.
Teens. Avoid oral sex during this time. Herpes from sores on the mouth can spread to partner's genital area.
The person with cold sores cannot infect himself at other sites. Reason: Immunity protects the rest of the body.

Overview:

Fever blisters or cold sores occur on one side of the outer lip.
They are a problem that recurs in 20% of normal adults. They are less common in children.
Cold sores can't hurt the person who has them. But, the virus can spread to others.
Cold sores are mainly a cosmetic problem.
You can treat cold sores at home.
Here is some care advice that should help.

Ice:

Use ice wrapped in wet cloth to the lip for 20 minutes.
Follow this with a wet tea bag (tannic acid) to the lip. Put this on for 10 minutes.
Do this once.
This home treatment may reduce the severity of the infection. You must start early before blisters are seen. This is usually when the lip is tingling or puffy.

Lip Ointment:

Apply a fever blister ointment 4 times per day. No prescription is needed. Ask your pharmacist to suggest one.
This also must be started as soon as any tingling or small bumps appear.
Until purchased, cover the fever blisters with a thin layer of petroleum jelly. This will help to reduce the pain.

Anti-Viral Medicine by Mouth:

Oral antiviral drugs may be helpful if started early. But, this is not standard practice. Reason: Fever blisters will go away on their own.
If your doctor has prescribed an anti-viral drug, take it as advised.
Try to start it when any small bumps appear and before they blister.

Pain:

For pain relief, give acetaminophen every 4 hours OR ibuprofen every 6 hours. Give as needed.

Prevention of Flare-ups of Cold Sores:

What to Expect:

Return to School:

Older children who have had cold sores before can go to school.
Young children with lots of sores may need to be kept home. Keep home until all sores are dry. If puts objects in mouth, avoid sharing toys for one week.

Definition