There is a group of patients with acute gastritis in which abdominal pain and vomiting are not obvious, but black stools appear, and in severe cases, even blood is vomited. This type of acute gastritis is mostly caused by the use of antipyretic and analgesic drugs such as aspirin and ibuprofen. Therefore, patients who have been taking antipyretic and analgesic drugs such as aspirin for a long time or in large quantities should be extra vigilant. If someone eats a meal in a poorly sanitized restaurant, a few hours later nausea, vomiting, stomach pain; or drink more wine at dinner, suddenly in the middle of the night stomach pain, vomiting more than, this situation suggests that they may have acute gastritis. How to prevent the occurrence of acute gastritis? You can take the following measures to prevent acute gastritis: 1, pay attention to dietary hygiene, do not eat placed too long, especially spoiled and tasteless food; overnight food must be steamed and disinfected before eating; do not eat in unhygienic restaurants; 2, do not eat too cold, too hot, too rough and hard food. Do not take out the food placed in the refrigerator immediately, and do not just eat hot pot and eat frozen ice cream; 3, do not gobble, chew and swallow. Dysentery is a common intestinal infectious disease, mostly caused by bacteria called dysentery bacilli. When dysentery is suspected, the doctor will ask the patient to do a stool bacterial culture, the culture results prove that the patient has dysentery bacilli in the stool to determine the patient has dysentery. Knowledge: Dysentery can also be caused by a pathogen called Amoeba. Pathogens are organisms that can cause disease in humans or other organisms, including bacteria, viruses, molds, parasites, etc.