Sunscreen is important for protecting our skin from the harmful effects of ultraviolet (UV) rays from the sun. UV rays can cause skin damage, premature aging, and increase the risk of skin cancer. Sunscreen works by absorbing or reflecting the UV rays before they can penetrate the skin.
It is recommended to wear sunscreen daily, regardless of whether you are indoors or outdoors. This is because UV rays can penetrate windows and even fluorescent and halogen lights, which means you can still be exposed to them indoors. Additionally, some outdoor activities, such as driving or sitting outside at a cafe, can also expose you to the sun's rays.
The American Academy of Dermatology recommends using a broad-spectrum sunscreen with an SPF (sun protection factor) of 30 or higher, which can block up to 97% of UV rays. Sunscreen should be applied 15 minutes before sun exposure and reapplied every two hours, or immediately after swimming or sweating.
It's important to note that sunscreen should be used in conjunction with other sun protection measures, such as wearing protective clothing, seeking shade during peak sun hours, and wearing a hat and sunglasses. By practicing sun-safe habits and using sunscreen daily, you can help protect your skin and reduce your risk of skin damage and skin cancer.