A tan - a darkening of the skin caused by exposure to UV radiation from the sun or sunbeds
Sunburn - is a burn produced by overexposure to UV radiation. A similar burn can be produced by overexposure to tanning lamps or from wielding arcs.
Skin cancer - a malignant growth on the skin. Many causes including repeated severe sunburns/long term exposure to the sun
Can also cause cataracts and premature skin ageing
Most sunscreens work by…