Cholecystitis can cause a low fever, which is called a fever. If cholecystitis occurs, it can be divided into two types: acute and chronic. In the case of acute cholecystitis, there is often acute abdominal pain, mainly caused by acute inflammation of the abdominal organ gallbladder. In addition to pain. There can also be radiating pain in the shoulder and back, and it is accompanied by fever, nausea and vomiting. Chronic cholecystitis is caused by chronic inflammation of the gallbladder, and the pain is not as severe as acute, but there is still fever and also nausea and vomiting. Based on the clinical symptoms and signs of the gallbladder, as well as laboratory diagnosis, it is determined whether ultrasound and CT are needed, and ultrasound is available to determine whether surgical treatment is needed. There are four types of temperature in general cases of hypothermia, low fever, moderate fever, high fever and ultra-high fever, and the value of low fever is 37.3℃-38℃. The normal body temperature is 36.5℃-37.2℃, which is measured by oral temperature. Moderate fever is 38.1℃-41℃, and if it is >41℃, it is called ultra-high fever, which is divided in this way.