Causes of stomach pain after eating lobster: i. gastrointestinal dysfunction, caused by indigestion; ii. allergic to the protein of lobster; iii. inflammation of the gastrointestinal tract, intestinal spasm caused by increased peristalsis of gastrointestinal function. Treatment: first, stop eating lobster; second, patients with abdominal pain can apply belladonna combination orally, 10 ml each time, 3 times a day; third, local heat, massage; fourth, supplemental vitamin C, B. Patients with indigestion can apply multi-enzyme tablets, if there is diarrhea patients can go to the hospital for infusion of electrolyte fluids. If the above treatment measures do not improve, it is recommended to go to the hospital for timely consultation.