Low fever may be related to physiological factors, and may also be caused by infectious or non-infectious factors.
1. Physiological factors: For example, when a woman is ovulating, her body temperature may be higher than normal, and she will have a low-grade fever, which will return to normal after the ovulation period, which is a normal physiological manifestation.
2. Infectious factors: For example, tuberculosis caused by Mycobacterium tuberculosis infection can often cause low fever. In addition, when there is a bacterial or viral infection, a low fever may appear in the early stage, but the body temperature may rise gradually.
3. Non-infectious factors: Frequent low fever may also be related to some non-infectious diseases, such as hyperthyroidism, tumors, blood system diseases, etc. Low fever lasts for a long time, and may be accompanied by symptoms such as fatigue, loss of appetite, and emaciation.
Prolonged low-grade fever is a sign of abnormality, and it is recommended that you seek medical attention as soon as possible.