I Have A Sore On My Wrist. I Thought I

I have a sore on my wrist. I thought I had scratched my skin with my watch band. The scratch seemed more of an abrasion at first. Then I thought it healed leaving a blister-like scar. Except tonight it started itching and seemed to have grown a ml or two. I have washed it with Dial, with Hydrogen Peroxide, which stopped the itching. Could it be a rash? Impetigo?