Lymph node swelling and abdominal pain in men is usually due to inflammation of the gastrointestinal tract, such as gastritis can be treated with omeprazole and other drugs, and intestinal tuberculosis can be treated with isoniazid and so on. 1. Gastritis: a disease that occurs in the gastric mucosa, the most important manifestations are abdominal pain, vomiting, abdominal distension and other manifestations, can also cause lymph node swelling, the main treatment is drug therapy, such as gastric acid inhibiting drugs (metformin, omeprazole, etc.) and antibiotic drugs (amoxicillin, cefaclor, etc.) treatment. 2. Intestinal tuberculosis: usually secondary to pulmonary tuberculosis, caused by Mycobacterium tuberculosis. The main symptoms are abdominal pain, change of bowel habit, night sweats, etc. The main treatment is anti-tuberculosis. The main treatment is anti-tuberculosis drugs, such as isoniazid, rifampicin and other drugs. 3. Peptic ulcer: including gastric ulcer and duodenal ulcer, there are many special types of ulcers, such as pediatric ulcers, ulcers in the elderly, etc. The main manifestations are abdominal pain, nausea, vomiting and other manifestations. It can be treated with medicines such as metformin, omeprazole and so on. Son of swollen lymph nodes abdominal pain to seek medical attention, diagnosis and treatment by a doctor.