<prompt> Male with patchy loss of scalp hair, eyebrows beard with grey hairAlopecia areataAnagen effluviumTelogen effluviumAndrogenic alopecia  <response>: Patchy loss, exclamation mark hair, autoimmune - Alopecia areata Alopecia areata is the commonest cause of patchy alopecia. Loss of Hair following a stress, infection etc - Telogen effluvium Loss of hair after Chemotherapy - Anagen effluvium Frontotemporal Recession - Androgenetic alopecia 