Blackheads are very common in young people but many of them do not know what they are. This is not a serious problem

Blackheads are caused by excess of sebaceous glands (the oil producing glands of the skin. The excess secretion of oil expands and thickens the pores of the skin. The oil collects in the pores and develops into a cyst or swelling. The pores are then blocked with hardened sebum or oil.

Blackheads can appear any part of the body such as on the back, chest and other areas that are rich in sebaceous glands. Blackheads cause the pores to be further enlarged and people with oily skins have a rough and coarse skin.