Alopecia areata is a type of hair loss that occurs when your immune system mistakenly attacks hair.
1. alopecia areata
Alopecia areata is a type of hair loss that occurs when your immune system mistakenly attacks hair follicles camera.gif, 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 in people younger than 20, but children and adults of any age may be affected. Women and men are affected equally.
2. Corticosteroids
This medicine suppresses the immune system. It can be given as shots, with the dermatologist injecting the medicine into the places with hair loss. Sometimes a patient gets a topical applied to the skin form of this medicine. It may be a cream, lotion, or ointment. The patient applies the medicine to the bare spots. Less often, patients take corticosteroid pills.

For adults with alopecia areata, these shots are often the first treatment tried. Patients receive shots every 3 to 6 weeks. Hair growth begins about 4 weeks after the last shot. Sometimes, it takes longer. Topical corticosteroids are less effective than shots. This is often the best treatment for children. Corticosteroid pills can have serious side effects. Dermatologists do not routinely prescribe them for this reason. Pills may be a treatment choice for patients with many bald spots.

3. Minoxidil
A hair re growth medicine, minoxidil 5%, may help some patients re grow their hair. Both children and adults can use it. Patients apply it twice a day to the scalp, brows, or beard. New hair may start to grow in about 3 months. Patients most often use this medicine with another treatment.
4. Anthralin
This medicine alters the skins immune function. The patient applies a tar like substance to the skin and leaves it on for 20 to 60 minutes. A dermatologist may call this short contact therapy. After 20 to 60 minutes, the anthralin is washed off to avoid the skin from becoming irritated.
5. Diphencyprone
This medicine is applied to the bald skin. It causes a small allergic reaction. When the reaction occurs, a patient has redness, swelling, and itching. Dermatologists believe this allergic reaction tricks the immune system, causing it to send white blood cells to the surface of the scalp. This fights the inflammation. It also prevents the hair follicles from going to sleep, and causing the hair loss.

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