If heavy menstrual flow occurs after hysteroscopy, it may be caused by endometrial damage or infection after surgery, etc. The specific causes need to be diagnosed after examination at the hospital and then reasonable treatment measures should be taken. 1. Endometrial damage: The endometrium will be damaged to some extent during surgery, so the uterus will contract poorly during menstruation, resulting in heavy menstruation. It is recommended to take drugs to repair the endometrium under the guidance of a doctor to correct this symptom, such as estrogen and progesterone. 2. Uterine cavity infection: Infection after hysteroscopy may lead to endometritis and myometritis, which in turn may cause congestion in the uterine area and increased menstrual flow. In this case, it is necessary to seek medical attention as soon as possible and give anti-infection treatment under the guidance of the doctor. In addition, if heavy menstrual flow occurs after hysteroscopy, it is recommended to avoid excessive activity to avoid bleeding. Do not eat spicy and stimulating, raw and cold food, and eat more high protein, eggs, lean meat, spinach, and broccoli to facilitate the recovery of endometrial damage, adhesions or infection.