Why has the skin on my hands gotten so fragile and what can I do about it?

Lately the least little bump against anything leaves an open wound on my hands. I had four bandaids on yesterday for the bleeding, just one so far today. I have four open wounds on my hands right now. What would cause this? I had a full blood workup and physical a few weeks ago that came back okay. Is it just winter skin? Any ideas? And yes, if it keeps up I will call my Dr.