The causes of increasingly fine and limp hair are broadly classified into genetic factors, malnutrition, excessive dyeing and perming, etc., and need to be analyzed specifically. 1. Hereditary factors: If the parents’ hair is fine and soft, it may cause the hair of their offspring to become increasingly fine and soft. 2. malnutrition: if malnutrition, the body lacks vitamins, trace elements, proteins, etc., will affect the synthesis of hair keratin, resulting in increasingly fine hair. 3. excessive dyeing and ironing: repeated excessive dyeing and ironing of the hair in a short period of time will have a certain stimulation and damage to the hair, making the hair hair more and more fine and soft. If the phenomenon of hair more and more thin and soft, need to pay attention to rest, avoid labor, diet can eat some rich in high quality protein food, such as black beans, black sesame, black rice and so on. If accompanied by other symptoms such as hair loss and alopecia, you need to go to the hospital in time for treatment.