Sun acne, also known as acne aestivalis or “Mallorca acne,” can appear as small, red or skin-colored bumps that are similar to acne but triggered by sun exposure. These bumps typically arise on the chest, shoulders, and upper back after spending time in the sun. Sun acne can be aggravated by a combination of sweat, sunscreen, and UV exposure, leading to clogged pores and acne breakouts. It’s important to protect your skin from excessive sun exposure and take proper skincare measures to prevent sun acne.