What is the reason for blood heat in hands and feet

First of all, we should know that blood heat is due to the invasion of heat toxin in the blood, its people will show fever in the hands and feet, petechiae in the hands and feet, etc., accompanied by night heat and early cold. The tongue is red and red with little fur. There is also a series of hot blood manifestations such as strong heat, sweating in the hands and feet, irritability, redness in the hands and feet, etc. When the heat toxin invades the blood, it often belongs to the blood phase of warm disease, which is relatively troublesome to treat.