While it’s important to protect your skin against the sun, certain types of sunscreen can contribute to the development of acne. Some sunscreen formulas use oil-based organic filters that can irritate the skin and cause breakouts. Other sunscreens to avoid are heavy and comedogenic products that can clog pores and give you blemishes and blackheads. The best way to protect your skin is to opt for a daytime moisturizer that contains a broad-spectrum SPF and always apply it to clean skin.