Alopecia areata, a type of autoimmune hair loss that can affect all ages and causes hair to fall out in round patches. (15,16)Genetic factors.Tight hairstyles that pull on the hair. (17-19)Shampooing, ...

Acne Acne is the most common skin condition in the United States, affecting up to 50 million Americans annually. (1) There are different types of acne (blackheads, whiteheads, pimples, acne cysts or ...