Hello, There are many causes for prolonged periods such as: 1. Uterine fibroids 2. Hormonal pills 3. Polyps 4. Pelvic inflammatory disease 5. Thyroid problems et cetera Use tablet Trapic MF for five days and investigate for thyroid, abdominal scan, serum FSH, LH et cetera. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Penchila Prasad Kandikattu