Accumulation of food can cause the body’s resistance to be lowered, thus causing fever. During food retention, the body’s immunity is lowered and bacteria and viruses can take advantage of the situation to invade and cause infections and fever. When fever from food accumulation occurs, symptoms such as constipation, abdominal pain, bloating, regurgitation, vomiting and loss of appetite may occur. Fever caused by food accumulation can be cooled down by physiotherapy when the temperature is below 38.5℃, and oral ibuprofen can be taken when the temperature is higher than 38.5℃. Usually, you should eat more meals, avoid spicy and stimulating foods, drink more warm water and do more exercise to promote digestion and absorption. When there is a serious accumulation of food, fever does not go away, it is recommended to go to the hospital in time, standardized treatment.