A hangnail is when a little piece of skin on your finger gets pulled away from your nail, making it a little sore and uncomfortable. Imagine if you had a little flap of skin on the side of your nail that got hurt and started to come off. It's like having a tiny paper cut on your finger near your nail. You might want to pick at it or wiggle it, but that can make it hurt more and take longer to heal. It's best to leave it alone and let your body take care of it. So if you have a hangnail, just be careful when touching things and try not to pull or bite it off. It will go away on its own soon enough.