Hot red blood on the face may be due to congenital factors, drugs, trauma and other reasons. 1. Innate factors: because the distribution of capillaries in the face is denser than normal, and the diameter of the blood vessels is relatively wide. When the temperature is too high, the local blood circulation speed will be accelerated when the emotion is more excited, resulting in red blood, can also be accompanied by the phenomenon of hot. 2. Drugs: long-term use of drugs containing steroid hormones, estrogen, etc., may induce capillary expansion, resulting in the phenomenon of red blood on the face. When a little exercise, when the weather temperature is high, the phenomenon of burning can occur. 3. Environmental factors: such as living in the environment of the plateau for a long time, prolonged sun exposure, blowing the sea breeze, may cause repeated damage to the local skin, capillary rupture can occur. The phenomenon of blood on the face and burning can occur after exercise. In addition, it is recommended that patients with red blood on the face and hot hair go to the hospital in a timely manner to clarify the cause, follow the doctor’s instructions for treatment, to avoid delaying the condition.