Don't go thinking I'm crazy for this ok? Go make him some tea Chamomile is best, but regular works if you have it. Steep the tea bags until the water is cool, squeeze out some of the liquid and rub his sore spots with the wet teabag or a cotton ball soaked in the stuff. It will help stop the itching. (works great to soothe sunburn too!)
You can also make a rinse for him with sage, thyme and epsom salts. This will calm him as well as help with the itch.
I hope he feels better soon!!