Fava bean disease is a genetic hemolytic disease caused by a deficiency of erythrocyte glucose-6-phosphate dehydrogenase at the peak of the jaundice value around two days after the onset of the disease. Usually the infant develops acute intravascular hemolysis within 1-2 days after the patient consumes fava beans or the nursing mother consumes fava beans, manifesting as general malaise, slight fever, headache, lethargy, anorexia, abdominal pain, nausea, deepening of urine color, followed by yellow staining of skin and sclera, hemoglobinuria, strong tea or soy sauce colored urine, elevated body temperature, vomiting, diarrhea and increased abdominal pain, and liver enlargement. Parents should take their children to the doctor in time and should not take medication at home privately.