Ellen K. Roh MD


Alopecia Areata

What is alopecia areata? Alopecia areata is a type of hair loss that occurs when your immune system mistakenly attacks hair follicles , which is where hair growth begins. The damage to the follicle is usually not permanent. Experts do not know why the immune system attacks the follicles. Alopecia areata is most common…

Causes of Hair Loss: Medicines and Medical Treatments

Medicines and medical treatments can cause hair loss. Medicines Many medicines that can cause hair loss include: Medicines used to treat cancer ( chemotherapy ). Birth control pills. Women who lose hair while taking birth control pills usually have an inherited tendency toward hair thinning. If hair thinning occurs, a…

Types of Hair Loss

There are many types of hair loss. It is often categorized according to when it takes place during the hair growth cycle: anagen, catagen, and telogen. The anagen phase is when your hair grows—your hair follicle forms a new hair shaft. Most (90%) of the hair on your scalp is in a growing phase that lasts from 2 to 6…

Hair follicle

A hair follicle is the sac where hair growth begins.

Cryosurgery

Cryosurgery (also called cryotherapy) is the process of destroying diseased skin cells (lesions) by freezing them with liquid nitrogen. It may be used to treat cancer or skin problems, such as warts. When cryosurgery is used to treat skin problems, the skin may first be numbed with a local anesthetic. The liquid…