Itchy rash can not eat three kinds of food is false. Itchy rash belongs to acute or chronic inflammatory itchy disease, the etiology is more complex, with the allergic reaction as well as the insect bite factors, external sensitizing contacts, sunlight, food and drug allergies may induce itchy rash. So there will be dome-shaped skin papules, accompanied by symptoms of intense itching, seriously affecting daily life. If it is caused by mosquito bites, there is no clear dietary contraindication. For itchy rash induced by food and drug allergies, it is necessary to avoid the suspected allergens to prevent recurrence of the symptoms of itchy rash. However, the specific allergic food varies from person to person and should be avoided reasonably according to one’s own situation. After the diagnosis of itchy rash disease, you need to consult a doctor in time, and follow the doctor’s instructions to use medication.