Fever in the left palm is mainly considered as chronic pyelonephritis, tuberculosis, connective tissue disease, etc. 1. Chronic pyelonephritis: there is persistent or intermittent palmar or generalized fever, which may also be accompanied by low back pain, fatigue, frequent urination, urgency and painful urination. Urine examination reveals abnormalities, which can lead to a preliminary diagnosis. 2. Tuberculosis: It is a common cause of fever of the hands, especially among young people, and is accompanied by night sweats, fatigue, cough, and depression. The presence of lesions can usually be detected by chest X-ray and laboratory tests. 3. Connective tissue diseases: rheumatic fever, systemic lupus erythematosus and rheumatoid arthritis can cause palmar fever, but the incidence is not high, usually accompanied by obvious systemic fever symptoms. If there are other causes of fever in the left palm, it is recommended to consult a doctor in time and actively cooperate with the doctor for treatment.