The past couple days the bottoms of my feet itch or the palms of my hands. The first day the itching was unbearable. My doctor had me take a Benadryl and prescribed me some lotion. They both helped. The next day after a couple hours of being at work the itching started but it was my elbows and knees so I took a Benadryl and it went away. Today I did not go to work, and around noon the bottoms of my feet and my elbows started itching. I took a Benadryl and it is going away. What can be causing this? When the itching comes, the places that itch get bumps on them that are raised like when I get a bug bite. I am not awaken at night by it and it goes away with the Benadryl