If you have a cough that causes left-sided chest pain after a cold, consider the following: 1. caused by the cough itself, because the intercostal muscles will contract and diastolic when coughing, if the cough is more frequent or violent, it can cause left-sided chest pain. 2. the cold is complicated by myocarditis. Some patients with cold can be complicated by myocarditis, which can cause left-sided chest pain, and often accompanied by symptoms of panic; for elderly patients with hypertension, diabetes, coronary heart disease, need to improve the electrocardiogram, cardiac ultrasound, cardiac enzymes, myocardial examination, except for cardiovascular causes of left-sided chest pain; 3, improve the lung CT, blood tests, except for lung infection, pleurisy, lung malignant tumors; 4 If there are lesions in the left side of the chest itself, but it is only triggered by cold and cough, such as intercostal neuritis or herpes zoster in the left side of the chest, it can cause left-sided chest pain when encountering cold and cough.