Stress can indeed contribute to acne flare-ups. Stress bumps, also known as stress acne or stress pimples, typically appear as red, inflamed pimples or cysts, often in clusters on the face, particularly along the jawline, cheeks, and forehead. They may be more tender than regular pimples and can be harder to treat. Managing stress levels through techniques like relaxation, exercise, and a healthy lifestyle can help reduce stress-related breakouts.