Lower left abdominal pain after eating seafood may be caused by food allergy, acute gastroenteritis occurring in the intestinal tract by bacterial attack, or the intestinal tract being stimulated by spicy food; you can take loratadine, levofloxacin, and hot compresses to relieve abdominal pain. 1. Food allergy: it may be due to the patient’s allergy to the protein in seafood, which leads to left lower abdominal pain. Patients should be prohibited from continuing to eat seafood, take loratadine and other anti-allergic substances in a timely manner, and can use montelukast and other intestinal mucosal protective agents. 2. Acute gastroenteritis occurs when the intestinal tract is attacked by bacteria: seafood contaminated by bacteria can lead to acute gastroenteritis after being consumed, and the symptoms of lower left abdominal pain should be taken in a timely manner to take antimicrobial drugs such as levofloxacin and cefaclor for treatment. 3. Intestinal stimulation by spicy food: eating particularly spicy seafood can lead to the intestinal mucosa by spicy stimulation and damage, the occurrence of acute lower left abdominal pain. You should stop eating spicy and stimulating food in time, and you can relieve the symptoms of abdominal pain by drinking more warm water, resting and applying hot compresses on the abdomen. If necessary, you can take oral teprenone and other gastrointestinal mucosal protective agents. After eating seafood left lower abdominal pain should promptly go to the hospital, improve the examination, give targeted treatment after a clear cause, not blindly self-medication.