There are several ways to help relieve hives in children. It is recommended to first identify the triggers and take gentle care measures. If the condition persists, seek medical attention promptly.

1. **Avoid potential triggers:** Record the child's diet, contact with objects, or activities before the onset of the illness. Common triggers include seafood, dust mites, and pollen. Temporarily avoid contact with factors that may cause the rash.

2. **Keep the skin cool and soothed:** Gently apply a cool towel to the itchy area for a few minutes each time to help reduce redness and itching; avoid scratching and trim the child's nails.
3. **Wear loose clothing:** Choose cotton, breathable clothing to reduce friction and stuffiness on the skin.
4. **Use medication when necessary:** If the rash recurs or itching is severe, consult a doctor about using anti-allergy medication. Using medication as prescribed can help control symptoms.
If your child experiences difficulty breathing, swelling of the eyelids or lips, please seek medical attention immediately. Maintain good home hygiene, and temporarily reduce the child's diet. Observe and record your child's reactions gradually; this will help with long-term management.