Hi, yesterday morning as I got up in my hotel room I noticed an itchy spot on my right hand inner side right beloe the pinky. I scratched and over a few hours time it became hard and a bit swollen. In the evening I noticed two small itchy bumps on the top side of the wrist of the same arm. Later I noticed itching and then a bump on my forearm and now on the upper arm. All itch mildly. The first bump is getting hot and more swollen and itches more. What can that be?