Why does smoking affect blood sugar fluctuations? It is understood that the nicotine in tobacco will stimulate the body’s adrenaline secretion, directly causing increased blood pressure and blood sugar fluctuations. In addition, nicotine in tobacco can cause excitation of the sympathetic nervous system, leading to increased release of catecholamines and other glucose-raising hormones, and catecholamines can weaken the role of insulin in the body. Studies by the American Diabetes Association point out that almost all diabetics who require amputation are smokers. Studies have also shown that smoking causes an increase in blood glucose levels while decreasing insulin sensitivity, which may be related to the direct effects of nicotine, carbon monoxide, or other chemicals produced by smoking. In addition to the effects on blood glucose, smoking also damages the respiratory and gastric mucosa of glucose users; increases blood viscosity and aggravates cardiovascular and microvascular pathology; causes poor peripheral vascular circulation and greatly increases the occurrence of chronic complications such as peripheral neuritis, vasculitis, and foot ulcers. The health risks of smoking are obvious, and for diabetics it is a chronic suicide. Experts suggest that diabetic patients, no matter how long the disease, the disease is light, smoking cessation must be beneficial to the condition, if the usual amount of smoking is relatively large, can not be completely quit at once, you can gradually reduce the amount, but also to the large hospital smoking cessation clinic to seek professional guidance.