Fever may be caused by tuberculosis or other causes, such as infectious fever as well as non-infectious fever. 1. Tuberculosis: Tuberculosis can also cause fever symptoms, usually with prolonged low fever, especially in the afternoon, accompanied by generalized fatigue and night sweating, and may cause respiratory symptoms and cough mucus, once the formation of lung cavities, will lead to an increase in the amount of sputum. 2. Other factors: infectious fever, generally related to bacterial infections, viral infections and fungal infections; non-infectious fever, generally induced by tumor factors, connective tissue diseases and blood diseases. Therefore, it is suggested that patients with fever need to go to regular hospitals for further examination to make a clear diagnosis, so as to avoid delaying the condition and causing serious consequences.