From what Ive seen, I dont think theres much he can do now that they are already dug in and itching. Maybe some hydrocortisone creme for the itch, but from now on if you think youve been in them, take a hot bath with the bleach in the water, it seems to kill them before they dig in. but it only takes a couple hours for them to dig in, and start itching. then it is misery, they are some aweful little critters. Worse than seed ticks, you cant see them, and dont know youve got em till your itchin like crazy, then its too late. Ive got a bad case of them right now too, nothing but welps from the knees down. Good luck to him. lol