When you have a cold and cough, smoking will aggravate the symptoms of the cold and also the cough, because originally the throat is congested and edematous, you need to drink more water, pay attention to rest and not eat food with too many calories in general. If you smoke, it will aggravate the redness and swelling of the throat, which is not conducive to the elimination of inflammation. Tobacco contains some chemical substances, which are harmful to the mucous membrane of the skin and the entire respiratory tract. Smoking not only aggravates cold and cough, but also causes new diseases, such as bronchitis and pneumonia. Smoking itself is a causative factor. When you have a cold and cough, you should pay attention to reasonable rest and diet, and develop good living and eating habits to improve the treatment of the disease. Frequent smokers are also prone to upper respiratory tract infections, and not paying attention to quit smoking after suffering from the disease can also cause fever and aggravate the infection in the body.