Drinking a can of wine during breastfeeding chest a little pain, may be local trauma, coronary heart disease, gastric disease and other reasons, according to the situation of ice and heat, rest, medication and other ways to deal with. 1. local trauma: breastfeeding drink a can of wine, there may be drunkenness, accidentally collided with the chest will produce pain, you can first ice packs, 48 hours after the hot compresses to relieve the pain, the serious go to the hospital to take a film to check, to understand the physical condition of the body and then symptomatic treatment. 2. Coronary heart disease: breastfeeding a can of wine, drinking a large amount of alcohol, may cause a reflex increase in heart rate, myocardial oxygen demand increases, myocardial ischemia is manifested in the anterior thoracic region of the crushing pain and can be radiated to the back, at this time, pay attention to the rest of the place, sublingual nitroglycerin pain can be relieved. 3. Gastric diseases: breastfeeding patients with gastric ulcer combined with reflux esophagitis, drink a can of wine, alcohol stimulation of the gastric mucosa, gastric mucosal contraction and spasm of gastric juice reflux to the esophagus, the appearance of the sternum after the burning pain, such patients may have to anti-inflammatory and anti-infective, acid suppression, protection of gastric mucosal treatment, such as gentamicin tablets, aluminum sulfate tablets and other treatments. Try not to go to a large amount of alcohol during breastfeeding, so as not to affect the development of the child through the milk.