The pain under the left breast in the recovery period of severe pancreatitis does not exclude the involvement of pain caused by pancreatic inflammation, and it is considered that there may be neuropathic pain, organ disease, etc. The pain under the left breast in the recovery period of severe pancreatitis is not excluded. 1. Involving pain caused by pancreatic inflammation: the condition of pancreatic inflammation is more serious, patients often have more severe abdominal pain, the occurrence of pain under the breast can not be excluded from pancreatic inflammation caused by involving pain, it is recommended that patients pay attention to the assessment of the recovery of pancreatitis. 2. Neuropathic pain: Intercostal neuropathic pain can lead to pain under the left breast, which is mostly stabbing, not intense, and may be aggravated by twisting the body or coughing. 3. Organ diseases: pain in the lower part of the breast may also occur when the patient has coronary atherosclerotic heart disease, pleurisy or pneumonia. 4. Infection: severe pancreatitis can be combined with other parts of the infection, if the secondary cause of mastitis, may appear local redness, swelling and hot pain symptoms. If pain under the left breast occurs during recovery from severe pancreatitis, it is recommended to first consult a gastroenterologist to evaluate the specifics of pancreatitis and then manage the accompanying symptoms according to the condition.