Why is the tip of my finger developing this split?

It’s my middle finger, on the right hand, on the left side of finger nail. It corresponds with where that finger nail ends, and runs down to the tip of my finger, and I think the nail may have something to do with it, but I don’t know what. It looks normal to me.
It wasn’t healing because I kept banging it, so I wrapped it up for several days, and used rubber gloves for doing the dishes. It was just about healed, so I took the band aids off, and now it’s splitting again.
Any ideas?