Which factor is NOT commonly associated with acne flare-ups?

Excessive hydration is not commonly associated with acne flare-ups. Acne is primarily influenced by factors such as hormonal changes, which can lead to increased oil production and clogged pores, and dietary habits, which may affect skin health and inflammation. Frequent sweating can exacerbate acne by creating conditions that encourage the growth of bacteria and block pores. However, excessive hydration does not have a direct link to worsening acne; in fact, staying well-hydrated can contribute to overall skin health. Thus, it lacks the association with acne flare-ups that the other factors possess.