Patients with chronic urticaria need to avoid food. First of all, all patients with chronic urticaria need to avoid some irritating foods, such as spicy ones, and also alcohol. For those who have clear allergens, they should avoid foods that make them allergic, and for those who do not find clear allergens, they should also watch out for foods that may aggravate hives, such as frozen seafood, mushrooms, bamboo shoots, etc., and some food additives, such as citric acid. All of these foods mentioned above may cause the aggravation of hives and should be avoided with care.