Leeches generally do not cause chronic gastritis. Leech is a kind of traditional Chinese medicine, which has the effect of breaking blood and clearing menstruation (breaking blood stasis and clearing menstruation), expelling blood stasis and eliminating symptoms (eliminating blood stasis and lumps in the body), and can be used for treating blood stasis and amenorrhea, obstruction in the abdomen (lumps in women’s lower abdomen) lumps (lumps), bruises and injuries, etc. After the use of the medicine, symptoms of digestive discomforts, such as black stools, vomiting of blood, and abdominal pain, may occur. Chronic gastritis is usually caused by Helicobacter pylori infection, drug irritation, physical irritation and other factors, and may present symptoms such as abdominal pain, bloating, belching (burping) and loss of appetite. Therefore, leeches generally do not cause chronic gastritis, but symptoms similar to chronic gastritis may occur after taking leeches. It is recommended to go to the hospital if you experience uncomfortable symptoms after taking leeches or if chronic gastritis is suspected.