Repeated low fever and chills over a long period of time may be caused by colds, tuberculosis, rheumatic fever and other diseases. 1. Some patients may suffer from low resistance to cold or infection, which may lead to cold and low fever, accompanied by cough, dizziness, nasal congestion and runny nose. 2. Tuberculosis: This disease is mainly caused by Mycobacterium tuberculosis infection, which is a kind of infectious disease, and the patients mostly suffer from afternoon night sweats (abnormal sweating after going to sleep, and the sweating stops after waking up), and low-grade fever as the prominent symptom, which can be accompanied by tightness in the chest, chest pain, coughing, coughing up phlegm and so on. 3. Rheumatic fever: this disease is mainly caused by type B hemolytic streptococcal infection, the bacteria can form a pyogenic source, resulting in low fever symptoms, a few patients can continue to have a low fever for 3 to 4 weeks. In addition to the above, there are other conditions that can cause long-term recurrent low fever and chills, such as urinary tract infections, etc. It is recommended that patients go to the hospital in time to identify the cause of the disease and standardized treatment.