Although there are many obese women with normal menstruation, but obesity can affect menstrual disorders is also a real situation, obesity can be divided into simple obesity and abnormal obesity two kinds. The former is caused by eating too much and consuming too little exercise, which has less influence on the body in a short period of time, while abnormal obesity often has other organic diseases in addition to obesity, such as central obesity caused by brain tumor and sequelae of encephalitis, which can have poorly developed reproductive organs, and obesity caused by hyperadrenocorticism, which can be characterized by full-moon face and buffalo back. Because estrogen is easily accumulated in the fatty tissue of obese women, leading to the disorder of estrogen metabolism, so 56.2% of obese women have menstrual disorders, with scanty menstruation as the most common, and 52.1% of basal body temperature monophasic. Therefore, overly obese patients with irregular menstruation should be examined in detail to exclude abnormal obesity caused by special reasons. Even if they are simply obese, they should try to control their diet and increase the amount of exercise so that they do not become too fat, so as not to increase the unfavorable factors causing menstrual disorders.