Dermatologists advise on sunscreen reapplication and skin monitoring

Dermatologists emphasize the importance of proper sun protection and regular skin monitoring to prevent skin cancer. While the common recommendation is to reapply sunscreen every two hours, experts clarify that this is a practical guide rather than a strict chemical expiration. The need for reapplication arises because the product layer is gradually lost through sweat, friction from clothing, sebum, and natural facial movements, which prevents the formation of a uniform protective layer.

In addition to using SPF, medical professionals stress the necessity of regular self-examinations. Monitoring moles, spots, and persistent lesions is critical, as ultraviolet radiation is a primary risk factor for skin cancer. Individuals should consult a dermatologist if they notice lesions that do not heal, change in size, display multiple colors, or bleed easily, particularly in areas frequently exposed to the sun.