Polycystic ovary syndrome is a relatively common endocrine disorder in gynecology. It is often seen clinically as infertility or menstrual irregularities. Most patients are obese. High insulin is a laboratory manifestation of polycystic ovary syndrome. The cause of high insulin is because the patient is insulin resistant and cannot use insulin effectively, making insulin compensatory. Insulin resistance prevents the use of glucose, which in turn increases the patient’s blood glucose and testosterone, leading to obesity, hairiness, acne, irregular menstruation, even amenorrhea, ovulation disorders, infertility, and a series of other adverse effects. This can cause great harm to the patient’s body and mind. Patients with polycystic ovaries usually pay attention to eating more vegetables and fruits, do not eat foods with high sugar content, regular work and rest time, participate in physical exercise, adhere to treatment, strict weight control, and develop scientific eating habits. After being diagnosed with polycystic ovary syndrome, it is important to provide timely and systematic treatment to reduce weight, control blood sugar and regulate menstruation. Most patients with polycystic ovary syndrome are able to conceive successfully. In conclusion, once a patient has irregular menstruation with obesity, she must go to a hospital gynecologist in time. Early detection and treatment is essential.