Pimple or cold sore: A cold sore is caused by herpes simplex virus and occurs in the same location repeatedly. It is often painful and starts as a a blister before crusting over. A pimple is a sometimes tender red bump that occurs in various areas where the hair follicle becomes blocked with oil (sebum) and bacteria forms.
Answered 1/21/2017
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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