For suntan lotion that intensifies sun exposure, see Indoor tanning lotion . For the electronic music group,

see Sunblock (band) . For the song, see Wear Sunscreen.

Sunscreen on back under normal and UV light

Sunscreen (also commonly known as sun screen, sunblock, suntan lotion, sunburn cream, sun

cream or block out)[1] is a lotion, spray, gel or other topical product that absorbs or reflects some of

the sun's ultraviolet (UV) radiation and thus helps protect against sunburn. Skin-lightening products have

sunscreen to protect lightened skin because light skin is more susceptible to sun damage than darker skin.

A number of sunscreens have tanning powder to help the skin to darken or tan; however, tanning powder

does not provide protection from UV rays.

Depending on the mode of action, sunscreens can be classified into physical sunscreens (i.e., those that

reflect the sunlight) or chemical sunscreens (i.e., those that absorb the UV light).[2]

Medical organizations such as the American Cancer Society recommend the use of sunscreen because it

aids in the prevention of squamous cell carcinomas.[3] Many sunscreens do not block UVA radiation, which

does not primarily cause sunburn but can increase the rate of melanoma and photodermatitis.[4] The use of

broad-spectrum (UVA/UVB) sunscreens can address this concern. Diligent use of sunscreen can also slow

or temporarily prevent the development of wrinkles and sagging skin.[5]