This is a symptom of allergic dermatitis caused by mosquito bites.

Suggestions:

1. You can take the anti-allergy medication ointment topical treatment, should soon be able to relieve the symptoms.

2. Avoid external irritants and local stimuli as much as possible in your daily life.

3. Do not eat sour, spicy dishes or other stimulating food.

4. During the attack period, avoid eating yellow fish, sea shrimp, seafood and other foods that can easily cause allergies.