Hair fall, or alopecia, affects both genders and can arise from genetics, hormonal changes, stress, or nutritional deficiencies. Common types include androgenic alopecia due to heredity and telogen effluvium from stress. Nutritional deficiencies, particularly in iron and vitamin D, can weaken hair. Medical treatments like chemotherapy and harsh hair treatments can also cause significant loss. A balanced diet, stress management, and avoiding excessive treatments are vital for reducing hair fall.