What are the main causes of hairfall?

The main causes of hair fall include genetic factors, hormonal changes, and medical conditions such as alopecia areata and thyroid disorders. Nutritional deficiencies, particularly in vitamins and minerals like iron and vitamin D, can also contribute to hair loss. Additionally, stress, certain medications, and harsh hair treatments may lead to increased shedding. Environmental factors, such as pollution and poor hair care practices, further exacerbate the issue.