Hi and welcome to Healthcaremagic. Thank you for your query. I am Dr. Rommstein, I understand your concerns and I will try to help you as much as I can. When bleeding occurs irregularly for longer period than than there are few possible causes and most common is a hormone imbalance. PCOS is one of the causes of hormonal imbalance. .While some causes may be easy to treat, others can indicate a serious underlying condition. Whether you notice spotting or heavier bleeding in between periods, it’s important to see your doctor for testing, diagnosis, and treatment options. Other potential other causes of bleeding between periods include a growth in the uterus or cervix, stress, change in medications, miscarriage, vaginal dryness. Your doctor will also likely give you a physical exam, including a pelvic exam. Diagnostic tests can help your doctor find the cause of the bleeding. Your doctor may draw blood to check hormone levels. Then right treatment can be recommened. I hope I have answered you query. If you have any further questions you can contact us in every time. Kindly regards. Wish you a good health.