Does sunscreen prevent sunburn?
While sunscreen helps minimize damaging sunburns, it doesn’t completely prevent burning. The best prevention is still to minimize the total amount of sun exposure your skin receives. This includes avoiding the sun between 10 a.m. and 4 p.m., when its rays are strongest; wearing a large-brimmed hat and sunglasses to protect your scalp and eyes; covering other sun-exposed parts of your body; staying in the shade when possible; and limiting the time you spend in the sun.
While sunscreen helps to minimize damaging sunburns, it doesn’t completely prevent burning. You still need to avoid the sun between 10 a.m. and 4 p.m., when its rays are strongest; wear a large-brimmed hat and sunglasses to protect your scalp and eyes; cover other sun-exposed parts of your body; stay in the shade when possible and limit the time you spend in the sun.