The pain below the left sternum is most common in the following two possibilities: 1, because of local fascial inflammation, periosteal inflammation, mainly due to overwork, or heavy physical labor and then feel the wind, cold and dampness, such as catching a cold or blowing a fan, blowing the air-conditioning, which in turn appears local pain, activity restrictions. The pain is mainly manifested as a localized tingling sensation, and sometimes radiates along the ribs to the back. When the pain is severe, oral medication is needed, and non-steroidal anti-inflammatory and analgesic drugs are usually chosen, such as Cilazapol capsules or Nimesulide dispersible tablets, but this kind of drug has a certain degree of stimulation to the stomach. If you have gastric problems, you need to cooperate with omeprazole enteric-coated tablets and pantoprazole enteric-coated tablets for symptomatic treatment. 2, because of heart disease, such as atypical angina or myocardial ischemia, the left side of the chest bone below the pain, this kind of pain at the same time will be combined with chest tightness, chest pain and other accompanying symptoms, you need to complete the electrocardiogram in a timely manner.