A blemish is a common skincare condition that affects the appearance of the skin. While technically any mark or discoloration can be described as a blemish, it is most commonly referred to as acne. These marks may result from excess oil production, hormonal changes, inflammation, or prolonged sun exposure. Beyond physical effects, blemishes can lead to feelings of self-consciousness and low self-esteem. In order to effectively treat blemishes, it is important to recognize the various types, including pimples, blackheads, whiteheads, and dark spots.