Medically reviewed by William Truswell, MDMedically reviewed by William Truswell, MD A scab is a dry, rough protective crust that forms over a cut or wound during healing. It starts to form as soon as ...

Most scabs on the scalp aren’t cause for concern. They may be caused by exposure to an irritant or a mild skin condition, and either heal on their own or with over-the-counter (OTC) treatments.

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." If you find yourself itching your head, you may have dry skin or irritating dandruff. While these are ...