Fava bean disease is due to hereditary erythrocyte hexaphosphate glucose dehydrogenase (G6PD enzyme) deficiency after eating fava beans, followed by the occurrence of acute hemolytic disease, also known as HuDouYang, fava bean yellow. It is common in children, especially in boys under 5 years old, accounting for about 90%, often occurring in the season when fava beans are ripe, eating fava beans or fava bean products (such as vermicelli, soy sauce) can cause the disease.

Patients usually eat broad beans within 24 to 48 hours after the onset of manifestation of acute intravascular hemolysis, with general discomfort, fever, nausea, vomiting, rapid anemia, jaundice, hemoglobinuria, hemolysis of severe shock, oliguria, anuria, acidosis, and acute renal failure symptoms. Its onset or not, the severity of the disease and the number of eating beans have nothing to do, sometimes eat 1 ~ 2 grains can not be spared, sometimes inhalation or contact with the pollen can be onset of the disease, and even sometimes breastfeeding mothers to eat fava beans can also be through the breast milk and caused the disease.

The degree of anemia and symptoms of the disease are mostly severe. Symptoms last for 2 to 6 days in general cases. If the anemia, hypoxia and electrolyte imbalance are not corrected in time, it can be fatal; however, if it is treated in time, it can get rid of the danger and recover. In low-prevalence areas, the disease is easily overlooked and missed