Red Mark After Having a Pimple?

I have this red mark from a pimple i have from 2 years ago. How can i get rid of it? What is it? Can a dermatologist get rid of it? The pimple i had was big. The other pimples that I have never have a mark left behind.|||Probably a small scar. You could try a little hydrocortisone cream on it but not for more than 7 days as it could make the skin thin. |||The only thing about that is if you eat candy or soda they will come. When they do don%26#039;t bus them and they will not leave a mark.Try using Clearasil