help!

Megan
Hey fellow <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> goers... so I need some help or advice in figuring out the bumps I have on my hands. I get them every once in awhile, very randomly. They're always on the bends of my fingers and they're really itchy and irritated. They are pretty painful and it's almost like a painful I can't explain.. I had them last summer for a while as well but much much worse, they got all scabby and swollen where I couldn't bend my fingers. It's not poison ivy, I know that for a fact. I am on birth control, take it regularly, same time every day and I never miss a pill.  I am sexually active, 17 y/o. And I am lactose intolerant?? If you know what you're doing please help!