Children's Cold Sore Information

Children's cold sore information also applies to adults with a cold sore on the lip.

A cold sore is an infection caused by the herpes simplex virus (type 1). It starts as a small swelling that may look a little red and then becomes a blister (vesicle) and is usually on the lip.

Initially it is very itchy and then the blister appears and then over a few days it scabs over. It is usually gone within a week to 10 days.

Can a cold sore occur in the mouth?

The first time children get the cold sore virus, they get a reaction within the mouth with lots of blisters and ulcers (an ulcer is a blister without the top) on the gums, tongue and inside the cheeks as well as the lips. This is called gingivostomatitis.

Children are often feverish with gingivostomatitis and find it hard to eat and drink. They can have enlarged lymph glands in the neck. The infection lasts 7 to 10 days.

Children's cold sores in the mouth can also look like hand, foot and mouth disease.

What is the treatment for gingivostomatitis?

• The important thing is to make sure your child continues to drink. She may not feel like eating much. Give non-acid fluids as they will sting, so avoid juice. Give milk or water instead.
• A mouthwash with anti-inflammatory and pain-relieving properties can sometimes help - you can try a Diphenhydramine (Benadryl) mouthwash or a Benzydamine (Difflam) mouthwash.
• Occasionally, children will get dehydrated and need to have an iv or nasogastric (ng) line placed to maintain their fluid intake until the viral infection settles itself.
• Paracetamol (Acetaminophen) may help keep your child comfortable.
• There is no specific treatment required for most children. Cold sore treatments are reserved for children with underlying problems. So, in children with a reduced immune system or recurrent attacks, specific anti-viral agents like acyclovir / aciclovir or valacyclovir / valaciclovir can be used.
• If your child has eczema, there can be a severe reaction if she gets a cold sore and it spreads. This is called eczema herpeticum and will require treatment so see your doctor.

What is the treatment for a cold sore on the lip?

If your child is able to tell you when the itch first starts, using a topical cream like Acyclovir / Aciclovir (Zovirax) can prevent the cold sore appearing.

This is one of the best cold sore remedy treatments available if you act early enough. Once the cold sore is present, there is not much use putting cream on it.

The important thing is to try and stop your child touching it as it will spread easily as herpes infection is contagious. You can also try and dry up the blister by dabbing it with tea tree oil or an alcohol swab.

Children's cold sore information - if the cold sore becomes infected it can look like impetigo.

Can toddlers get cold sores anywhere else?

Occasionally, the herpes virus can cause an infection around the eye, involving the cornea. This will affect the vision so if your child has a red eye that is weepy or is complaining of poor vision, see your doctor.

Children with eczema can get a widespread herpes infection that needs treatment, so if this is the case with your child, you will need to see your doctor.

Children's cold sore information: It would be very unusual for a toddler to get a herpes infection involving the genital area unless they had been interfered with.

Is a cold sore caused by the same virus as genital herpes?

No. Cold sores are caused by Herpes simplex virus type 1 while genital herpes is usually caused by the type 2 virus.

How can I prevent cold sores in my child?

If your child gets cold sores as a response to sunlight, wearing sunblock on the lips may help.

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