My boyfriend has been itchy for 4 days now and he developed flat, nickel-sized bumps under his arm (by the pits), on his hips and the sides of his torso. His right wrist and right foot have also began swelling. He said it s not painful, just itchy with a bit of a burning sensation. I had him use Benadryl lotion and a calahyst-type lotion and both seem to help, but everything is still the same. Any insight would be appreciated.