I was wearing nail tips with gel on my two thumb nails because the nails had ripped, and last week, I noticed a dark color underneath the one on my left hand. I took the nail tip off and there was a small greenish/yellow circleish place about the size of 1/4 an eraser head. I took the nail tip off, and the color has faded some. This morning, I noticed the same discoloration under my other thumbnail, and it is roughly the same size--1/4 the size of an eraser head, and dark brown/green in color. There is a bit of discomfort if I push on that area, but not much. I did have to hold the nail tips on pretty hard to get them to adhere, so I m working if I bruised my nailbed or if I have a fungus.