Plugged Pores a medical situation occasioned by blocked skin pores that cause lesions. Skin pores can be clogged by sebum for a number of reasons that are not yet understood by the Biologists. Dead cells and other biotic organisms get trapped in the pores causing lesions common to spots. The most frequent one is the comedones which appear in two varieties: the black heads and the white heads. White head  is a plugged pore that has begun to swell on the skin due to bacteria dead cells and/or  other things that has turn out to be trapped under the skin. Its name is derived from its appearance. Those comedones that open illuminating the dark follicle plug from within are the black heads.

Most people call these Acne comedones pimples. Small comedones, microcomedones also know as papules, form from contained cellular reactions that cause acne. They mostly occur in clusters too small to be seen by un aided eye. Pustules, nodules and cysts can form in stern form of acne. A pustule is a comedone full of pus or dead cells making it larger in size. Nodules are relatively hard, roughly spherical and more severe form of papules that extend in to the tissues forming a lump under the skin. It pains much when it is touched. Cysts emerge from pustules or the nodule but are fluid filled.

The causes of plugged pores that end in acne are unknown to doctors and scientists. They try to explain through theories that combine a blend of factors like genetics, hormonal change and stress. Initially acnes were blamed to the diet but today, though not proven; stress and hormonal change are the most suspected causes. Most people get the acne, mostly on face, at puberty due to hormonal changes that occur in the body.