Hello! I'm a male, 21 years old, who recently discovered a small red patch on my left leg. It's numb, and peels a lot - it fell off in two big pieces when i showered, and has done so on other occasions as well. It's about the size of a fingernail, and formed after a small bruise on my leg (the bruise healed, but some time after the spot showed up).

I would really love some idea of what this is, and if i should go to the doctor.