Many people often confuse ovarian polycystic changes with polycystic ovary syndrome. Polycystic ovaries are a type of ovarian polycystic change found by ultrasound. There are many possible factors that can cause this phenomenon, and there is a 20% chance that a woman of childbearing age will have this condition detected by ultrasound, and it does not require treatment if there are no other co-morbidities. In contrast, polycystic ovary syndrome is a syndrome with a multi-causal pathogenesis and a polymorphic clinical presentation. In recent years, the clinical features of this disease have been further recognized as hyperandrogenism and persistent anovulation, and the ovaries can also show polycystic changes. The etiology is unclear. The clinical manifestations are mostly menstrual disorders, amenorrhea, accompanied by infertility after marriage, and can present with varying degrees of Kaohsiung due to the accumulation of androgens in the body. Given that polycystic ovary syndrome is a complex disease with diverse clinical manifestations, doctors usually need to do relevant laboratory tests to make a clear diagnosis, including various hormone measurements, blood glucose measurements, ovulation monitoring, etc. As seen above, polycystic ovary-like changes are only an imaging manifestation of ultrasound and do not need to be treated if there is no associated disease, however, polycystic ovary syndrome is a complex endocrine disease that is very tricky to treat and usually requires a combination of therapeutic tools.