Sleeping at night on the soles of the feet fever may be the environmental impact, may also be caused by peripheral neuritis, tinea pedis and other factors. 1. Environmental impact: If the sleeping environment is not ventilated, hot and humid or the air conditioning temperature is turned up too high, it will lead to a large amount of heat in the body, and thus the soles of the feet will appear to be hot. 2. Peripheral neuritis: the bottom of the foot is cold or exposed to some chemicals, which will lead to the peripheral nerves of the bottom of the foot to ooze and other inflammatory reactions, which will cause the bottom of the foot sensory abnormalities, and appear the situation of the hot soles of the feet. 3. Tinea pedis: When the skin on the soles of the feet is infected by fungus, it will cause inflammation on the soles of the feet, which will cause fever on the soles of the feet when sleeping. If the soles of the feet continue to be hot at night, you need to pay attention to it and go to the hospital in a timely manner in order to clarify the cause of the disease.