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.
There are...other forms of alopecia that are temporary: â¢ Alopecia areata â a disease that presents as small round areas of hair loss about the size of a quarter. This can occur on the scalp, in the beard area, even eyebrows and eyelashes. This is considered to be an auto-immune disease, but the cause is unknown.