Diarrhea after eating lychee may be caused by gastrointestinal intolerance, indigestion and gastrointestinal inflammation. 1. Gastrointestinal intolerance: If the patient lacks the enzyme that breaks down fructose, it may cause the patient to develop lychee intolerance, causing the patient to experience abdominal pain and diarrhea. 2. Indigestion: If the patient consumes too much lychee, it may cause the patient to suffer from indigestion, resulting in the gastrointestinal tract not being able to absorb the water properly and the symptoms of diarrhea. 3. Gastroenteritis: If patients eat lychee is not clean, it may lead to patients with infectious gastroenteritis, pathogenic bacteria invade the gastrointestinal tract, so that the gastrointestinal mucosa is stimulated, gastrointestinal secretion increases, resulting in diarrhea. Eat lychee diarrhea patients, it is best to stop eating lychee, if the patient’s diarrhea is serious, please go to the hospital in time for medical treatment.