Patients with polycystic ovary syndrome are fat for several reasons: first, because patients with polycystic ovary syndrome are often combined with elevated androgens, and elevated androgens lead to relatively well-developed muscles in women, so they become more robust and fat; second, because patients with polycystic ovary syndrome have multiple follicles in the ovaries bilaterally, this leads to an increase in estrogen. The increase of estrogen will lead to water and sodium retention in the body, which will lead to fatness.