1. If the allergic symptoms are mild, you don't need to take any medicine or special treatment, and it will heal itself after 1 or 2 days.

2. If the allergic symptoms are obvious and the whole body itching is unbearable, you can try to take common antiallergic drugs (such as loratadine).

3. You can also take vitamin C while taking antiallergic drugs.

4. During the allergic period, you should not eat seafood such as crabs and shrimps, and do not eat greasy and spicy food.