14 y old son has a sunburn and 50+ tiny bug bites on his neck from micro caterpillars at the Lacrosse field. Benadryl (diphenhydramine) every 4 hrs. Not helping much?

Sunburn/bites. He may require a short course of PO steroid treatment in addition to antihistamines. Keep the area clean and try cold packs and neosporin. All the best.