Breastfeeding women become thin, may be related to nutritional deficiencies, overwork, wasting diseases, the specific analysis is as follows: 1, nutritional deficiencies: breastfeeding women due to postpartum body has not fully recovered, may not return to the appetite of pre-pregnancy, coupled with the intake of nutrients to promote the quality of breast milk, the mother’s diet nutrition needs to supply their own needs and the needs of the child two, therefore, the intake of nutrition deficiencies Therefore, insufficient intake of nutrients and insufficient caloric energy may lead to gradual thinning; 2, overwork: breastfeeding women have to take care of their children, and the irregularity of the child’s resting time in the beginning months will lead to the mother getting up frequently at night to breastfeed, causing poor sleep and physical and mental exertion, which will easily lead to weight loss; 3, wasting diseases: if breastfeeding women lose serious weight in a short period of time, for example, 20-30 pounds in a month or even If a breastfeeding woman loses weight seriously in a short period of time, for example, 20-30 pounds or even more in a month, it may be a disease such as hyperthyroidism, and she needs to have her thyroid function checked to exclude the possibility of wasting disease.