Fever is something that everyone has experienced, and it not only causes discomfort but also affects appetite. Actually, having a fever is not necessarily a bad thing. High temperatures can kill bacteria and viruses in the human body, but if the fever does not subside, it is also a particularly frustrating thing. So what's going on with a fever? What is the reason for the persistent fever?
Fever, also known as fever, refers to the situation where the heat source directly acts on the temperature regulation center, the dysfunction of the temperature center, or various reasons causing excessive heat production and reduced heat dissipation, resulting in an increase in body temperature beyond the normal range. Everyone's normal body temperature varies slightly and is influenced by factors such as time, season, environment, and menstruation. It is generally believed that when the oral temperature is above 37.5 ℃, the axillary temperature is above 37 ℃, or the temperature difference between days is more than 1 ℃, it is a fever. Fever is the most common clinical symptom and an important clinical manifestation in the process of disease progression, which can be seen in a variety of infectious diseases and non infectious diseases.
Reasons for persistent fever
1. Infection: Infections caused by various pathogens, such as bacteria, viruses, mycoplasma, fungi, etc., can all cause fever, with bacteria being the most common, followed by viruses. Common diseases include colds, pneumonia, bronchitis, etc.
2. Malignant tumors: such as leukemia, malignant histiocytosis, malignant lymphoma, colon cancer, primary hepatocellular carcinoma, etc.
3. Reaction diseases: such as medication fever and rheumatic fever.
4. Connective tissue diseases: such as systemic lupus erythematosus, dermatomyositis, nodular polyarteritis, mixed connective tissue disease, etc.
5. Other diseases: such as hyperthyroidism, heatstroke, heat stroke, etc.
The article analyzes the symptoms of fever and the reasons why fever does not subside. If the temperature of the fever does not exceed 38.5 degrees, physical methods can be used to cool it down. If it is higher than 38.5 degrees, it is best to take antipyretic medicine. If the fever does not subside for a long time, it is necessary to seek medical attention in a timely manner.
