A tear in the skin on the side of your nail - it's not actually part of your nail. Hangnails should be clipped and washed because they can tear more, get sore and lead to an infection.
A type of birthmark. Some are bright red and look like strawberries and some are bluish-purple and make the skin swell and bulge.
Bumps that can pop up on your skin when you've been exposed to something that you are allergic to, or that bothers your body. They can itch or sting.