Hair loss after giving birth to a child is serious, if the amount of hair loss per day within 100 is a normal physiological phenomenon; if more than 100, it is a pathologic hair loss, consider the possibility of resting hair loss or other diseases. 1. Resting alopecia: this disease is a disease characterized by synchronous shedding of a large number of resting hairs due to hair follicle growth cycle disorders. Its main causes are endocrine disorders, emotional factors, malnutrition and so on. (1) Endocrine disorders: the hormone level metabolic disorders in the body from pregnancy to childbirth, the physiological functions have not been restored to their original state, which may cause severe hair loss after giving birth to a child. (2) emotional factors: postpartum may have too much emotional fluctuations, or postpartum with children tired sleep deprivation, may also cause serious hair loss after giving birth to a child. (3) malnutrition: postpartum body weakness, poor diet, not timely supplementation of nutrients, etc., can lead to serious hair loss after giving birth to a child. (2) other diseases: if after giving birth to a child, the mother suffers from thyroid disease, iron deficiency anemia, severe zinc deficiency caused by enteropathic acral dermatitis and other diseases, may appear after giving birth to a child severe hair loss phenomenon. After giving birth to a child hair loss serious, there may be other reasons, need to go to the hospital in time to check, clear diagnosis and follow the doctor’s instructions for treatment.