We are not trying to make a salad out of your face, but we kid you not when we say this that tomatoes are effective. They help shrink the open pores, thus reducing the pimples. You can use tomato in different ways to treat those nasty, little pimples on chin. You can just take a piece and rub it on the affected area, or if you don’t want the pulpy feeling of tomato against your skin, you can take a teaspoon of tomato juice, mix it with a few drops of lemon and using a cotton ball, dab this mixture onto a pimple. Leave it for 4-5 minutes and wash it off later.