The causes of uterine fibroids are many, and the common causes are as follows: 1. Physiological causes: uterine fibroids often occur in older women, such as 40-50 years old women, and are accompanied by hormone level changes before menopause. In addition, it is related to factors such as excessive pressure in life and irregular life, which may cause heterogeneous tumors in muscle tissues; 2. Pathological reasons: in most cases, it is due to endocrine or neurohumoral regulation factors, which leads to heterogeneous growth of normal muscle tissues, and then benign smooth tumors such as uterine fibroids will appear in the muscles. There is no need to panic if uterine fibroids appear. Fibroids are tumors that grow in bones and muscles and most of them are benign tumors with low chance of malignant transformation. Most fibroids are benign tumors with a low chance of malignancy. Smaller fibroids usually do not need to be treated. As the hormone level decreases after menopause, fibroid tumors may gradually shrink or even heal naturally. If the fibroid is large enough to cause symptoms, it may need to be surgically removed.