Hi
It may be very difficult to assess your problem with so less information. However, there are many conditions that
can result in localized random hair loss in male as well as females, such as alopecia areata, scarring alopecia, infections like ringworm, folliculitis, piedra, seborrheic dermatitis and folliculitis.
Alopecia areata is a genetic condition which causes sudden round patches on the scalp along with inflammation of the roots of the hair follicles.