There is no such thing as the 5 most harmful effects of cold in the body. Cold can be caused by a sudden drop in temperature and exposure to cold. The harm of the cold into the body is damage to yang qi, blockage of blood and qi, stagnation of meridians and so on. 1. Cold is yin, damage to Yang Qi: Yang Qi can control yin and drive away cold, but if the cold is too prevalent, Yang Qi is not only insufficient to drive away the cold, but also injured by the cold, manifested as cold (fear of cold), fever, nasal congestion, epigastric cold pain (stomach and stomach and abdominal pain), diarrhea, and so on. 2. Cold stagnation: cold evil injury, easy to make the blood and fluid condensation, meridian blockage, manifested as pain, aggravated by cold, pain relief when the temperature rises. 3. Cold main collection: cold evil attack on the human body, can make the qi convergence, the coupling (pores), meridians, tendons contraction and contracture, manifested as cold sweat, head and body pain, limb flexion and extension of unfavorable and so on. If you are not feeling well, it is recommended that you go to a regular hospital as soon as possible to clarify the cause of the illness, and under the guidance of the doctor, it is not advisable to self-diagnosis and treatment, so as not to delay the condition.