Enteritis is the inflammation of your small intestine. In some cases, the inflammation can also involve the stomach (gastritis) and large intestine (colitis). There are various types of enteritis. The most common are, viral or bacterial infection, radiation induced, medication induced, alcohol or drug induced, enteritis related to poor blood flow, enteritis related to inflammatory conditions, such as Crohn’s disease or ulcerative colitis.
Symptoms of enteritis can include fever, nausea, vomiting, diarrhea, and abdominal pain. Viral enteritis usually clears up without treatment in a few days. However, if you have symptoms of enteritis for more than three or four days, or you suspect that you have bacterial enteritis, seek medical attention.
Pietrangelo, Ann. Enteritis. https://www.healthline.com/health/enteritis