The causes of chest and back pain after drinking include: digestive tract diseases, coronary artery ischemic spasm, and dorsal fasciitis. 1. Digestive diseases: alcohol stimulates the gastric mucosa, if the original reflux esophagitis, gastritis, peptic ulcer and other diseases, it will lead to the aggravation of the disease, causing stomach pain, resulting in chest pain. 2. Ischemic spasm of coronary arteries: drinking alcohol leads to spasm of coronary arteries, decreasing blood supply to the heart, inducing angina attack, and pain in the chest, left chest, left shoulder and back. 3. Back fasciitis: If the back catches cold after drinking alcohol, leading to inflammation of the fascia, it will also cause pain and discomfort in the back. There may also be other causes of post-drinking chest and back pain, such as cholecystitis and pancreatitis. It is recommended to consult a doctor in a timely manner to clarify the cause of the disease and then follow the doctor’s instructions for treatment.