There are many causes of abdominal pain, which are not necessarily related to smoking, but smoking is indeed harmful. Abdominal pain is a very common clinical symptom. First of all, abdominal pain is divided into severe pain in the whole abdomen and dull pain with obvious limitations. Severe abdominal pain, also known as acute abdomen, is characterized by severe abdominal pain, tenderness, rebound pain, abdominal muscle tension and even shock. Acute abdomen often means extensive lesions and serious illness. No matter what kind of disease it is, the patient's family members should seek medical treatment immediately, and doctors should make differential diagnosis according to the patient's medical history and other complications. Never give the patient painkillers or drink alcohol before the patient is rescued and diagnosed by a doctor, so as not to aggravate the condition and cover up the symptoms. If there are no symptoms of peritoneal irritation such as tenderness, rebound pain and muscle tension, but the severe abdominal pain has not been relieved for more than an hour, you should go to the hospital. In addition to the above situations, dull abdominal pain is mostly caused by minor digestive tract disorders, but it may also be related to diseases of chest organs, urinary tract and reproductive organs, which can be distinguished by the pain site and other accompanying symptoms: the accompanying symptoms can be diagnosed as periumbilical pain or colic, which suddenly attacks and aggravates the pain in the upper abdomen or periumbilical area of intestinal ascaris (see intestinal parasitic diseases), and can be relieved by antacids. Acute gastroenteritis or gastric ulcer is often accompanied by vomiting and diarrhea, intermittent spasmodic pain in the lower abdomen, intestinal dysfunction, chronic, periodic, rhythmic abdominal pain and tenderness in the upper and middle abdomen, which is closely related to diet. Peptic ulcer, in the active stage of the disease, may appear persistent severe pain. Cholecystitis or diaphragm lesions radiate from the right rib to the right shoulder, with paroxysmal pain, accompanied by vomiting, and the septum is completely painless. Biliary ascaris has persistent pain in the right upper abdomen and tenderness in the liver area, accompanied by pain in the lower abdomen of icteric viral hepatitis, accompanied by burning pain when urinating, and the pain of frequent cystitis or other urinary tract infections begins in the back. Then transferring or spreading urinary tract diseases to the groin can be caused by this kind of pain (such as urinary tract infection or kidney calculi), which often leads to paroxysmal diarrhea and intermittent constipation, colon allergy, or male ulcerative colitis, lower abdominal pain, groin swelling, discomfort, hernia, stabbing pain in the upper abdomen and angina pectoris spreading to the left shoulder.