Malignant Cold, a Chinese medicine symptom name. The manifestation of “bad cold” is that the patient feels afraid of cold, adds more clothes and quilts, or warms up close to the heat source, but still feels cold and cannot be relieved. In Chinese medicine theory, there is the saying that “if there is one point of bad cold, there is one point of superficial evidence”, so “bad cold” is often used as an important indication for clinical diagnosis and identification of exogenous superficial evidence. In clinical work, malignant cold is often seen together with fever, headache, nasal congestion and runny nose, thin tongue coating, floating pulse and other symptoms. In response to the above symptoms, the following measures can be taken: “If the evil is on the surface, sweat it out”, using medicines with pungent and warm sweating to relieve the surface, so that the evil will be relieved with sweating.