A smooth muscle tumor growing on the left wall in the uterine cavity indicates a uterine smooth muscle tumor. If the fibroid is small and there is no discomfort, it can be left untreated with regular follow-up. If the fibroid is small in size and has minor discomfort, it can be treated with medication. If the size of the fibroid is large, surgical treatment is required. When the size of the fibroid is small and the patient does not have any discomfort, it can be left untreated, and the patient can go to the hospital for regular checkups. If the patient is in the perimenopausal period, there is a certain chance that the uterine smooth fibroid will gradually shrink or even disappear after menopause. If the size of the fibroid is small, but the patient has abdominal pain, lower abdominal mass, leukorrhea and other symptoms, you can follow the doctor’s instructions to subcutaneous injection of goserelin, leuprolide and other gonadotropin-releasing hormone analogs, to inhibit the secretion of gonadotropins in the body. If the size of the fibroid is large, drug treatment is ineffective or malignant transformation of the fibroid is suspected, surgical treatment, such as myomectomy, hysterectomy, etc., can be performed as prescribed by the doctor. Once a smooth muscle tumor develops in the left wall of the uterine cavity, it is advisable to consult a doctor to determine whether treatment is necessary.