37.8 degrees belongs to low fever. The treatment of low fever, first of all, we should seek medical treatment to identify the cause of the disease; secondly, we can use physical cooling or use non-steroidal antipyretic and anti-inflammatory drugs to deal with it as appropriate. Low-grade fever is a symptom that can be caused by a variety of reasons. There are a variety of colds and flu, or rheumatic immune diseases, as well as a variety of bacterial infections, fungal infections, blood diseases. If the low fever is accompanied by fatigue, muscle pain, sore throat, headache, it may be caused by colds or influenza, can be given ibuprofen or phenmetrazine tablets, as well as clearing the heat and detoxification of cold and flu medicines to improve the symptoms; if accompanied by sputum, thick sputum, blood tests, high white blood cells, the consideration of bacterial infections, we need to give the appropriate antibiotics to anti-infective treatment. If you have a low fever for a long time, you need to go to the hospital to do the corresponding examination to make a clear diagnosis for the cause of the disease. As for the principle of fever reduction, when the temperature is lower than 38.5 degrees, physical cooling can be given first. You can drink more water, hydration, as well as warm water baths and wipes, take away the body heat to make the body temperature drop.