Hair growth is very slow may be malnutrition, mental psychological factors, improper hair care and other factors. 1. malnutrition: long time picky eating partiality, resulting in the body lack of a variety of trace elements and minerals, so that the body’s nutritional imbalance, will affect the growth of hair, resulting in slow growth of hair. 2. Mental and psychological factors: in the work and life, mental and psychological pressure is too large, may lead to endocrine disorders, will also affect the growth of hair, so that hair growth is slow. 3. Improper hair care: prolonged perming and coloring of hair or frequent use of irritating shampoos that damage the scalp can lead to slow growth of hair, and can also easily lead to hair loss. Hair growth is slow and accompanied by other abnormalities, it is recommended to consult a doctor for the appropriate examination, clear causes for targeted treatment.