Patients with urticaria should avoid foods that may trigger or worsen their symptoms and are advised to adjust their diet under the guidance of a doctor. The following are some common food types to be mindful of:

1. Foods high in histamine

Some fermented foods (such as yogurt and kimchi), pickled fish, and leftover food may contain a lot of histamine, which can easily cause skin itching or redness.
2. Spicy and stimulating foods
Chili peppers, Sichuan peppercorns, alcohol, and other substances may stimulate blood vessel dilation, exacerbating skin redness and itching.
3. Seafood and high-protein foods
Shrimp, crab, shellfish, and some nuts (such as peanuts) are common allergens, and consuming them can easily trigger hives in sensitive individuals.
4. Processed foods and additives
Snacks and beverages containing preservatives and artificial colors may affect the immune response; it is recommended to choose natural ingredients.
Keeping a food diary can help monitor your body's reactions. If symptoms recur, consult a doctor promptly for allergen testing. Maintaining a light diet, drinking plenty of water, and following a regular sleep schedule can help alleviate discomfort.