What is the cause of long-term low fever?

Once there is a long-term low-grade fever, patients do not need to panic. At the same time, we should pay attention to the following points: First, patients need more rest than usual. Patients are not suitable for services, institutions, schools, nursing and other jobs that require contact with others until the cause of low fever is clear and treated in time. Second, patients need better nutrition than usual. Fever is the manifestation of excess heat production, and the process of heat production needs to consume more energy, so patients need to supplement refined protein (such as pork, beef, chicken, fish), milk, eggs, vegetables and so on in time. Third, patients must carefully observe and record the change process of their body temperature. For example, you can make a table by yourself, measure your body temperature three or five times a day, record it at different times, and find out the highest point of your body temperature in a day. At the same time, you can also write down other uncomfortable symptoms such as sweating, dizziness, abdominal pain, diarrhea and emaciation on this form. This way, when you go to see a doctor again, it will be clear at a glance, because doctors are most concerned about the changing trend of body temperature and various accompanying symptoms. Fourth, patients need to know whether people around them have similar situations to themselves. If the person you are in contact with has a fever at the same time, it means that your fever may be contagious. At this time, it is best to live in isolation from others, especially children, and not to live with patients. Fifth, patients should try not to go to crowded places or participate in group activities until the cause of long-term low-grade fever is clear. Human body temperature is one of the most important life characteristics of human beings, which fluctuates within a certain range with the 24-hour day and night change, rather than being constant. The methods of measuring body temperature usually include oral temperature, axillary temperature and anal temperature, among which axillary temperature and oral temperature are commonly used. According to Zhou Zhiping, the normal body temperature is generally 36.7℃ ~ 37.7℃, the axillary temperature is 36.6℃ ~ 37.4℃, and the anal temperature is 36.9℃ ~ 37.9℃. If a person's daily oral temperature fluctuates between 37.5℃ and 38.3℃, and the armpit temperature fluctuates between 37.4℃ and 38.3℃ for more than three weeks, it can be called "long-term low fever".