Pimples are small lesions on the surface of the skin, which sometimes cause great inflammation and irritation. Pimples are formed when the pores on the skin becomes clogged or infected. This usually occurs when blackheads or white heads become severe. Sometimes pimples develop out of no reason and usually go away with the passage of time but in most cases these pimples are an initial phase of acne or other skin problems. This usually happens when people ignore pimples, which results in severe acne. If further ignored acne pimples may often turn into ugly scars.