There is evidence to suggest that stress can contribute to the development of acne or exacerbate existing acne symptoms. According to a study published in the Journal of Investigative Dermatology, psychological stress can increase sebum production, which can lead to the development of acne. Additionally, stress can cause hormonal changes that may trigger acne outbreaks. However, it is important to note that stress is just one of many factors that can contribute to acne and is not the sole cause of the condition.