​Thanks for the query. This is a common condition, and probably indicates a disturbed immune system. You may be having a condition called alopecia areata, if there are well defined patches of hair loss. Treatment is simple and has different approaches. You need to discuss with a dermatologist to understand it at length. Skin is the mirror of internal health and to get a perfect skin you need to treat both ways - internally and externally. A healthy diet and lifestyle is mandatory to achieve results.​