Why do i have excessive hair growth due to pcos?

Male hormones: All women produce male hormones, but women with pcos produce slightly higher levels of them than normal women, but much less than men do. Just as they do in men, these hormones make facial hair grow.

Simple: With pcos there are many, many small cysts on each ovary. Each of those cysts produce estrogen, but they also produce testosterone. The excess testosterone can cause hirsutism, it can also cause acne. See your doctor for treatment.