Pimple Marks On Back. This occurs after the inflammation of the pimple subsides and the new cells contain too much melanin. When your skin is opened up like when you pop a pimple and then closes back together you can get abnormal pigmentation texture and tone that looks different from the rest of your skin.

Crush a few peppermint leaves to extract the juice. The pimples and pimple spots appear in most cases as the natural boils on your skin. People who are prone to acne have oil producing glands that are.
Other causes for lump on the back can arise from lipoma or non cancerous cell growth.
Rinse with warm water and then pat dry and see the results immediately. Dip the cotton ball in lemon juice and apply it to pimple marks and leave it overnight. Rinse with warm water and then pat dry and see the results immediately. However this can be a presenting symptom.