Back fever but normal body temperature may be caused by reflux esophagitis, cholecystitis, etc., which can be analyzed on a case-by-case basis. In patients with reflux esophagitis, decreased peristalsis of the stomach and relaxation of the lower esophageal sphincter can lead to reflux of gastric acid, pepsin and food into the esophagus, which can lead to symptoms such as acid reflux, belching, retrosternal discomfort, and back fever, and so on, so that gastric mucosal protectants such as bismuth potassium citrate can be taken under the guidance of a doctor. In patients with cholecystitis, certain inflammatory factors can stimulate the surrounding nerve tissues, resulting in pain in the right upper abdomen, and the pain can also be radiated to the back, which often manifests as back fever and soreness, etc. Anti-inflammatory cholecystolithiasis tablets and other medications can be taken under the guidance of the doctor. Patients with fever in the back but normal body temperature should seek medical attention to identify the cause and timely treatment to avoid delaying the condition.