Frequent Periods: Causes, Symptoms & When to See a Doctor

* Hormonal imbalances

* Pregnancy

* Ovulation

* Thyroid problems

* Polycystic ovary syndrome (PCOS)

* Uterine fibroids

* Endometriosis

* Pelvic inflammatory disease (PID)

* Certain medications

* Stress

* Weight loss

* Excessive exercise