Name a common skin concern for teenagers.

Acne is a prevalent skin concern for teenagers, primarily due to hormonal changes that occur during puberty. These hormonal fluctuations increase the production of sebum (oil) in the skin, leading to clogged pores and, consequently, breakouts. The combination of excess oil, dead skin cells, and bacteria can create an environment conducive to acne development. This makes it particularly common during the teenage years, as many adolescents experience varying degrees of acne.

While dryness, rosacea, and wrinkles are skin concerns that can affect individuals at various ages, they are not typically associated with the teenage demographic. Dryness can occur for various reasons, but it doesn't have the same prevalence as acne during adolescence. Rosacea is more commonly diagnosed in adults, and wrinkles are usually a concern that arises later in life as part of the aging process. Thus, acne is uniquely tied to the developmental stage of teenagers, making it the most significant skin concern in that age group.