In summer, all kinds of fruits are very popular with people. Litchi, mango and longan are rich in natural glucose, protein, carbohydrates and vitamins, which can strengthen the brain, strengthen the body, strengthen the spleen and benefit the liver. But because of the high sugar content, it is easy to get angry. Eating too much will cause disorder of glucose metabolism in the body, resulting in litchi disease (hypoglycemia). People with chronic tonsillitis and pharyngolaryngitis will aggravate deficiency fire. After eating fresh litchi, allergic people will have allergic symptoms such as dizziness, nausea, abdominal pain, diarrhea, rash and itching.