It sounds as if your son has a skin condition known as 'papular urticaria' Read more about this on Google.Papular urticaria is an allergic reaction to insect bites,especially to sand fleas and to mosquitoes. A single insect bite brings out this entire rash and lasts for months. It is itchy and children often scratch the itchy spots a lot.No medicines seem to help much but children usually grow out of this rash.Give yor son high doses of vitamin B1 known as Thiamine HCL. He needs to take 25mg daily for 3 months. Speak to your pharmacist. You can also apply Mylocort ointment twice daily to very itchy areas when necessary.
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