The birth of the acne may be constant, but this doesn’t necessarily mean that the acne will always be the same. Different types of acne can pop out from the same face. But all acne start as a comendo, which is a lesion caused by oil and bacteria that plug the pores. Basically, a comendo is waiting to grow into a pimple. The pimple itself has many classifications. Some pimples do not necessarily have pus or redness.

Source: Health and Fitness: Acne Articles from EzineArticles.com