Red itchy lump getting bigger on my finger

[BeckyC1993]

So last week i fell over and grazed my palms. I Dont know if it is relavent because I didnt hurt my finger falling but it was right after that I noticed it. So last week when it appeared it was a small red bump on my middle knuckle on top of my finger which kind of hurt to touch. Now a week on its got twice as big and itches. It also had a bit of dry skin in the middle which fell off and now looks like a darker dip in the middle. Does anyone know what this might be/what will help it go away? Thanks

[purple1234567]

Maybe a wart?  Sometimes a wart can be tender and itch- but I'd get to your doctor for a firm diagnosis and also to treat it as needed.