Menstruation started at age 13 and has lasted for 15 days without stopping.

Menstruation, also known as a period, lasting for 15 days without stopping at age 13 may be caused by endometrial hyperplasia, endometriosis, hormonal imbalance, ovarian cysts, or other factors.

1. Endometrial Hyperplasia or Endometriosis

Endometriosis is a disorder of the female reproductive system in which endometrial tissue grows outside the uterus, leading to symptoms such as cyclic bleeding and pain. These conditions can cause excessive thickening of the endometrium and incomplete shedding during menstruation, resulting in prolonged menstrual periods. After diagnosis by a physician, surgical treatment may be required.

2. Hormonal Imbalance

Hormonal imbalance refers to a state in which the body's hormone secretion is out of balance. Common symptoms include irregular menstruation, insomnia, mood swings, skin problems, and sexual dysfunction. After medical diagnosis, follow your doctor’s instructions to take medications such as drospirenone and ethinyl estradiol tablets or Jinyuting tablets.

3. Ovarian Cysts

Ovarian cysts are fluid-filled or semi-solid sacs that form within a woman's ovaries. Common symptoms include lower abdominal pain or discomfort, irregular menstruation, abnormal vaginal bleeding, bloating, or indigestion. Depending on the diagnosis, treatment may involve surgery or medications such as levonorgestrel-ethinyl estradiol tablets, Marvelon tablets, or mifepristone.

In addition to the above, prolonged menstruation lasting 15 days may also be caused by uterine fibroids or certain medications. If menstrual periods last excessively long, prompt medical attention is recommended to prevent adverse effects on health.