If you feel hot but do not have a fever, there are usually several factors: 1. From the perspective of Chinese medicine, this disease belongs to the fire evidence, usually excessive liver fire, excessive lung fire, excessive heart fire, the upper focus of the fire, but the body temperature is not high. 2. From the perspective of Western medicine, usually endocrine and metabolic diseases, the most common disease is hyperthyroidism, there will be a high catabolic situation, and feel hot. 3, usually in the early stage of the cold will also appear very hot, but the body temperature does not rise significantly, especially the bacterial cold is particularly significant. 4, for example, some endocrine and metabolic disorders, estrogen and progesterone secretion imbalance, female puberty and menopause before and after the above clinical symptoms and performance. 5, and finally, for example, rare diseases, such as tumors, tuberculosis, AIDS and other conditions, immune system, Lastly, for example, rare diseases such as tumors, tuberculosis, AIDS, etc., the above clinical manifestations may also occur in cases of low immunity perimeter.