People who spend a lot of time tanning themselves are actually damaging their skin.
That is according to the British Skin Foundation, which explained that skin becomes darker as a result of being exposed to unhealthy UV radiation.
Bevis Man of the organisation said that sunburn is another indication that skin is being damaged and urged people to be cautious in the hot weather.
"UV light from the sun makes the skin age prematurely by breaking down collagen and elastin which give the skin its support," he noted.
"This is why the first places where wrinkles tend to appear are on the face, neck, backs of the hands and forearms – generally the areas most exposed to sun damage."
Mr Man added that the signs of skin damage include brown pigmentation, coarse wrinkles and leathery skin.
His comments come after a report from the Teenage Cancer Trust revealed that many 13 to 19-year-olds deliberately get sunburnt because they mistakenly believe it will lead to a tan later on.