Fever and stomach pain need to choose the treatment according to the value of the specific body temperature, if the body temperature is between 37-38.5 ℃, there is no need to take antipyretic medication for the time being, you can take lansoprazole dispersible tablets, clarithromycin dispersible tablets as well as tinidazole tablets to treat gastritis. After the symptoms of stomach pain are relieved, you can improve your diet, mainly fluid and semi-liquid diet. Observe the body temperature changes, if the body temperature is more than 38.5 ℃, you can take nimesulide tablets, nimesulide granules to reduce fever. When treating the disease, you need to find the cause of stomach pain, if it is an acute gastritis caused by improper diet, it is recommended to use intravenous infusion of medication for treatment, because gastritis caused by improper diet is a low-grade fever, timely replenishment of the body’s energy can play a role in reducing the fever, and give the drugs to protect the gastric mucous membrane can play a role in relieving the stomach pain.