Burning is most commonly associated with fever. A hot body is a subjective feeling, and it is best to use a thermometer to measure the body temperature at this time. Fever is most often caused by infectious fever, such as fever caused by bacteria, viruses, mycoplasma, chlamydia and other infections, such as upper respiratory tract infections like pharyngitis and tonsillitis, influenza caused by viruses, and then common pneumonia, bile duct infections, septic inflammation, etc. In addition, generalized fever can also be seen in patients with neurological disorders, which can feel hot all over the body, but the body temperature is normal.