The reasons why heart disease is afraid of the cold include the cold will easily aggravate the heart disease, the heat production is reduced, the blood circulation is relatively poor, so it is afraid of the cold. 1. Cold can easily aggravate heart disease, so patients with heart disease are afraid of it, and they should pay attention to keeping warm in winter and add clothes appropriately. 2. Heat production is reduced, so it feels cold, because heart disease is often accompanied by physical weakness, metabolism is impaired, heat production is reduced, the limb temperature is low, so it is afraid of cold. 3. Poor blood circulation: heart disease patients manifested as blood circulation disorders, cold limbs, because of poor resistance to cold, so such people are afraid of cold. Heart disease patients are afraid of cold, so pay attention to keep warm, if the maintenance is not, the condition is aggravated should be timely consultation.