Common Sunscreen Mistakes and How to Avoid Them

By the Editorial Team · Monday, July 27, 2026

Dermatologists stress the importance of using broad-spectrum, water-resistant sunscreen with SPF 30 or higher, applied generously and reapplied regularly, to effectively protect against harmful UV radiation and reduce the risk of skin cancer. This sunscreen use, combined with additional sun safety practices, is essential not only for preventing melanoma but also for addressing other skin issues like hyperpigmentation, even for individuals indoors or with darker skin tones.

Sunscreen plays a vital role in protecting skin from damage and reducing the risk of skin cancer, yet many individuals frequently misuse or misunderstand its application. Dermatologists emphasize selecting a broad-spectrum, water-resistant sunscreen with a sun protection factor (SPF) of 30 or higher to ensure effective defense against ultraviolet (UV) radiation.

Proper application is critical for optimal protection. Experts advise applying approximately one ounce of sunscreen—the amount needed to fill a standard shot glass—to cover the entire body. Additionally, sunscreen should be reapplied every two hours or more often when swimming, sweating, or toweling off.

Certain factors increase the likelihood of developing melanoma, a serious form of skin cancer. These include experiencing five or more blistering sunburns, using tanning beds, and having a personal or family history of skin cancer. Signs to watch for during skin checks include asymmetrical moles, irregular or poorly defined borders, multiple colors within a single mole, diameters larger than a pencil eraser, and moles that change over time.

Beyond preventing skin cancer, sunscreen also helps mitigate other UV-related skin concerns, such as hyperpigmentation. For individuals with darker skin tones, tinted sunscreens can offer added protection by blocking visible light, which may exacerbate pigmentary issues.

Regarding use in children, sunscreen is generally recommended for babies over six months old, while younger infants should be kept out of direct sunlight to avoid exposure. Experts also advise that sunscreen should be part of a broader sun safety strategy, which includes wearing protective clothing, hats, and sunglasses, as well as seeking shade, especially during peak sun intensity hours.

Even when indoors, sunscreen application can be beneficial since certain types of UV rays can penetrate window glass, potentially causing skin damage over time. These combined measures aim to provide comprehensive protection against the harmful effects of sun exposure.

This article was reported by synthesizing coverage from multiple independent news outlets to present a balanced, unbiased account. Read about our editorial standards. Spotted an error? Let us know.