thanks for posting your query on healthcare magic
The problem most probably you are talking about is Alopecia Areata
though ill have to see you personally to confirm the diagnosis.
Alopecia areata is a very common form of hair loss and is considered to be an autoimmune disease
ie the body immune system which should target only foreign particles or infections starts fighting against ones own hair . It can affect men, women and children, and typically affects the scalp in patches. If the condition affects the face, or beard, it is called alopecia areata barbae.
I would suggest kindly see a dermatologist
to confirm the diagnosis and start the treatment
Sometimes the recovery occurs spontaneously over a period of time.
The dermatologist will prescribe some medicines including corticosteroids
eg mometasone local application, oral medication systemic corticosteroids , drugs like levimasole and if doesnt control injections of corticosteroids in the lesion
Mostly it would recover with this treatment .Just incase the result is not achieved and it persists then we can cover it with hair transplant
by FUE method
i hope i have answered to all your queries
Do post again if any doubts persist