Difficulty smoking in the chest is more obvious, mainly considered to be related to lung diseases, digestive tract diseases, heart diseases and so on. 1. Lung diseases: such as tuberculosis, pneumonia, pulmonary edema and other diseases, can lead to chest pain, coughing, coughing up phlegm, dyspnea and other symptoms. Smoking under such circumstances will further stimulate the lungs, which in turn will exacerbate the condition. 2. Digestive diseases: such as reflux esophagitis and other diseases, can lead to chest burning pain and other symptoms, and tobacco nicotine, tar and other harmful substances will further exacerbate the situation of the affected ulcers, and then appear more obvious pain symptoms. 3. Heart disease: such as coronary heart disease, myocarditis and other diseases, can lead to chest pain, chest tightness, shortness of breath and other symptoms. If the patient smokes, it may also trigger coronary artery spasm, causing an acute attack, and then obvious chest pain, chest tightness and other uncomfortable symptoms. If the above symptoms occur, patients should quit smoking in time and seek medical treatment as soon as possible.