Reason for excessive hair fall Excessive hair fall or hair loss can be caused by a variety of factors. Some of the most common causes of hair fall are: 1.Genetics: Hair loss can be hereditary and can run in families. 2.Hormonal changes: Hormonal changes, such as those that occur during pregnancy, menopause, or thyroid problems, can cause hair loss. 3.Nutritional deficiencies: A lack of proper nutrients, such as iron, vitamins, or protein, can lead to hair loss. 4.Stress: Physical or emotional stress can lead to hair loss. 5.Medical conditions: Medical conditions, such as alopecia areata or scalp infections, can cause hair loss. 6.Medications: Certain medications, such as chemotherapy drugs, blood thinners, and antidepressants, can cause hair loss.