hello. hairfall upto 100 hairs is normal. the hairfall if more than 100 requires treatment. the causes of hairfall could be certain dietary deficiencies, stress, smoking, certain scalp diseases, certain hormonal diseases, etc. drink lots if water, have lots of greens and fruits. Almonds, spinach, egg , yogurt are certain foods which have high biotin content. biotin is very important for maintaining hair and skin health. consult a dermatologist for more help. regards