The difference between blood coolness and blood heat is the different pathological characteristics, different symptom manifestations, and different therapeutic medications. 1. Different pathological characteristics: blood cool refers to the cold evil invasion of the blood, stagnation of qi, the blood does not flow well leading to blood stasis, for blood cold plus blood stasis two pathological factors. Blood heat is fire heat, invasion of the blood (in the four periods of warm disease Wei Qi Ying blood, belong to the most in-depth stage or location) caused by the acceleration of blood flow, blood heat internal disturbance evidence. 2. Symptoms are different: blood cool symptoms manifested as stomach cold, pain in the hands, feet and abdomen, pain is reduced by warmth, the color of the skin is dark purple and cold, or dysmenorrhea, menstrual delay, menstrual period is not, the color of the menstrual period is dark purple and there are clots, etc.; blood heat is manifested as hot flashes, fever at night aggravated by thirst, redness of face, heartburn and insomnia, agitation, frantic, fugue, the blood color of crimson, or rashes are revealed. 3. Different therapeutic drugs: Blood cold treatment is to warm the menstruation and disperse cold, often take warm menstruation soup and other additives and subtractions. Blood-heat treatment is to clear heat and cool the blood, the medicine with rhinoceros horn dihuang tang or Qingying Tang and other additives and subtractions. Blood cold and blood heat evidence, need to be guided by a professional doctor to identify the use of medication, can not be self-medication, to avoid medication is not the right evidence to avoid the wrong condition.