How does it itch when the weather is wet?

This is a symptom of eczema. You'd better buy some skin cream at the drugstore to relieve it. You can take traditional Chinese medicine to regulate your body, combine medicine with life and diet, apply ointment appropriately, and avoid seafood, spicy food, beef and mutton. You can usually cook some mung bean soup to drink, which can remove toxins from the body and make your skin better.