The best known types of ultraviolet sunlight are UVA and UVB. Too much exposure to either of these rays will damage your skin. Not only will overexposure cause wrinkles and brown spots, prematurely aging the skin, but it can also have far more serious consequences such as skin cancer.
The effects of sunburn and sunstroke are unpleasant - as anyone who has experienced it will know. Short term exposure may result in painful burning and reddened and peeling skin.
Sunstroke is more serious: it dehydrates the sufferer and can cause high temperatures, vomiting and headaches.
But the most devastating side effect is undoubtedly skin cancer. It is estimated that 90% of non-melanoma skin cancers and 60% of melanoma skin cancers (the more serious form) are caused by over exposure to the sun.
Worryingly, melanomas are not just caused by prolonged and consistent over exposure: any episodes of sunburn, no matter how infrequent, also increase the risk due to the damage this does to your skin cells.