I have alopecia areata, when i first found out i had a patch on my head it was small.. but now it's huge! half of my head. what do i do?

See a dermatologist: There is no cure for alopecia areata. Hair often re-grows on its own. Treatment can help the hair re-grow more quickly. A dermatologist may give you corticosteroids, minoxidil, anthralin, diphencyprone (dpcp), and other treatments. Some treatments are combined, but if you would the hair to grow back faster i recommend seeing a dermatologist.