How many stages of acne are identified?

Acne is generally classified into four distinct stages, which helps provide a framework for understanding its development and severity. The first stage is typically characterized by the presence of comedones (commonly known as blackheads and whiteheads), which result from clogged hair follicles. In the second stage, there are inflammatory lesions such as papules, which are small red bumps that can occur when the hair follicles become inflamed. The third stage involves more severe inflammation that can lead to pustules, which are filled with pus and are often painful. Finally, the fourth stage may involve cystic acne, where deeper, more painful nodules develop under the skin.

Recognizing these stages is crucial for determining the appropriate treatment and management strategies for acne, as the severity and type of acne can greatly influence the approach to healing. This classification is instrumental for healthcare professionals in assessing acne and guiding patients towards effective treatments based on the stage of their condition.