The common causes of coarse and hard hair are: genetic factors, poor cleaning, perming and dyeing damage to the hair, and so on. 1. Hereditary factors: individual congenital hair texture is hard, parents with coarse and hard hair, the child may also inherit parents with coarse and hard hair texture; or scalp lack of grease and moisture, will also lead to hair performance for coarse, hard. 2. Cleaning is not in place: often use alkaline shampoo to wash hair, damage to the hair resulting in dry, coarse and hard; or a long time without washing hair, hair stained with too much grease and dust, the appearance of the appearance looks very coarse and hard. 3. Perm and dye damage to hair: individual often perm hair, chemical reagents damage hair, resulting in loss of water in the hair, keratin and hair scale damage, making hair become coarse and hard. Coarse and hard hair generally does not affect the life, such as accompanied by a large number of hair loss and other uncomfortable symptoms, it is recommended to go to the regular medical institutions in a timely manner.