Many years ago I saw a man named Ma, and the first thing he said when he went to the hospital was, “I often wake up in the morning with one side of my face itchy and swollen, why is that?” It looked like he was very distressed. The doctor looked closely at both cheeks of the patient and found that they were asymmetrical, with the right side obviously fuller and swollen than the left side, which seemed like swelling due to toothache, but not exactly like that. Doctors patiently understand what he ate, especially dinner habits eat what diet, bedding, including quilts, mattresses and pillow heart filled with what content, and then, to his blood tests, blood eosinophils, according to the medical history of the (inhalation, ingested allergens and contact) allergens (a total of 30) intradermal test, including buckwheat (because the patient pillow is buckwheat pillow), the results found that the patient to beans (+ + +) and buckwheat (+ + + +) was positive, he was instructed to go back to closely observe the effects of these two substances on him, a week later the patient’s follow-up, recognizing that when the beans were eaten in dinner, after sleeping on a buckwheat pillow to that side of the bed, the next morning this side of the face itching and swelling more serious; if the beans were eaten for dinner, without a buckwheat pillow, the symptoms are less severe; if you do not eat beans at night still use buckwheat bark pillow, the next morning there is still swelling on one side of the face, but not as serious as the swelling after eating beans at the same time. Finally, the doctor gave the patient a diagnosis of the cause, that is, buckwheat peel and bean curd mixed allergy to angioedema. Wang Lian Yun, Department of Allergy, Shanghai Renji Hospital