A desert is a region of land that is very dry because it receives low amounts of precipitation (usually in the form of rain but may be snow, mist or fog), often has little coverage by plants, and in which streams dry up unless they are supplied by water from outside the area.
Alopecia areata is an autoimmune disease. Autoimmune means that the body's immune system attacks the body. When alopecia areata develops, the body attacks its own hair follicles. A person's genetic makeup, combined with other factors, triggers this form of hair loss.
Alopecia Areata: Alopecia Areata, a disorder of the immune system causing hair loss. The immune cells attack the hair follicles thus causing them to fall out. This can cause loss of all hair on the body or loss in just one area such as eyebrows, beard, eyelashes or scalp. There is no cure for this but it can be treated.