I had one cystic pimple this past summer, it doesn't happen often but I was irritated. I put toothpaste on it (I know I know such a bad decision:( ) and it became a brown mark that peeled off and became red. It them developed a light brownish color and it remained on my face. Now it is a light brownish faded color with a bump underneath. What is that bump? Is it another blind pimple or something? It's been there for a while now and I just want it to go away soon. I've tried warm compress, face washes and lemon to make the mark lighter.