I sunbathed in my teens - will I get skin cancer? Experts reveal how long the danger lasts after you stop tanning, whether your skin can repair itself... and the REAL risk of the occasional beach holiday

Both using a sunbed and lying in the sun for hours have long been known as sure-fire ways to drastically increase the risk of deadly skin cancer.Studies suggest that those who've had more than five sunburns in childhood are around 80 per cent more likely to suffer melanoma. The risks of sunbeds have been pulled into sharp focus this week following the death of 30-year-old Chelsea Tantum, a self-confessed sun-worshipper who admitted competing with her friends for the darkest tan.Tantum, who died from melanoma skin cancer, used sunbeds since the age of 15. But to what extent can you erase your risk by changing your ways in adulthood? Reassuringly, experts have told the Daily Mail that those who've used sunbeds in their early life will not inevitably develop melanoma, which kills around 2,600 Britons every year.In fact, they say there may even be a point where damage to the skin is repaired naturally.Chelsea Tantum, 30, tragically died from advanced melanoma after more than a decade of sunbed use'It's a little bit like smoking and the risks of developing lung cancer,' says Dr Christopher Rowland Payne, a consultant dermatologist at The London Clinic.'If you only smoke one or two cigarettes, the increase in your risk of lung cancer is very small - but it does exist. If you smoke more, you have a higher risk. 'It's the same with sunbeds. The sooner you stop, every day that passes after that your risks reduce.'The reason that continued sunbed use - or regular exposure to UV radiation from the sun - raises this risk, is because the skin is subjected to repeated damage. However, the good news, according to Dr Rowland Payne, is that the skin has a remarkable capacity to repair itself once excessive UV exposure is reduced. Provided there is no further burning, the expert said the risk of melanoma may fall significantly after 'three or four years'.This could even apply, he says, to people who used sunbeds regularly for decades, or were once keen sunbathers.'It would never quite go back to the zero risk of someone who has never sunbathed or used a sunbed, but it would get pretty close,' he added.He stressed, though, that this does not mean previous damage disappears entirely. Other forms of skin damage, including some of the more common non-melanoma skin cancers, can take longer to develop and may remain linked to UV exposure many years afterwards.Those at greatest risk of such complications, he said, are people who repeatedly expose themselves to UV radiation, particularly those who repeatedly tan and burn. This means that the longer a person goes without using a sunbed or getting sunburnt, the lower their melanoma risk may become.'The risks improve as every day goes by if they stop,' he says.Dr Rowland Payne adds that it's 'always a good idea' to avoid sunbeds, as well as protecting from sunburn.'Exposure to UV light, whether it is from the sun or a sunbed, can cause sunburn or sun tan,' he continues.'Neither is completely harmless for your skin but sunburn is worse.'Research suggests that having five or more sunburns in your life doubles your risk of melanoma. Meanwhile, a single blistering sunburn in childhood or adolescence may more than double it.There are various studies that show the dangers of developing the disease in later life may come from UV exposure at a young age. However it is widely accepted that using sunbeds is far riskier than lying in the midday sun.The ultraviolet (UV) rays emitted by the beds are around 12 times stronger than normal average sunlight, and a third more potent than the hottest day of a British summer.These penetrate the skin and damage the DNA in skin cells, worsening with repeated use. Over time, the destruction can cause the cells to mutate and develop into cancer. Dr Rowland Payne says sunbeds are particularly harmful because they can expose the skin to more intense UV radiation than natural sunlight. 'Sunbeds are a much more concentrated form of radiation, which makes the dangers greater,' he continues.Shockingly, research suggests that almost two in five adults aren't aware of the risks sunbeds pose.Ms Tantum, who was described by her family as 'strong, beautiful, funny, determined and completely unforgettable', began using sunbeds aged 15.She continued for more than a decade before being given a devastating diagnosis at 28: stage 3C melanoma, which progressed to stage 4 – the most advanced stage – before she turned 30. A major analysis published in the British Medical Journal (BMJ) in 2012 found that first using a sunbed before the age of 35 increased the risk of melanoma by 87 per cent.Meanwhile, a large Norwegian study of 141,000 women found that those who started using sunbeds before the age of 30 had a melanoma risk around a third higher than women who had never used them. They were also diagnosed 2.2 years earlier on average.The BMJ review also found that anyone who had ever used a sunbed was 20 per cent more likely to develop melanoma than someone who had never used one. And charity Melanoma UK says the risk rises by up to 20 per cent for each decade of use.Those most at risk are people who can tan but also burn, and who have a large number of moles. People who tan may believe their skin is protected, he explained, but if they burn, UV is still damaging the skin.Having a lot of moles also raises the risk, as UV can stimulate them, increasing the chance of one turning into melanoma. More than 20,000 people are diagnosed with melanoma every year, up from 14,000 in 2012, and the figure is projected to rise by almost a third by 2040, to 26,500. UV radiation is also linked to other skin cancers, including basal cell carcinoma – the most common skin cancer – and squamous cell carcinoma, another frequently diagnosed type.Merkel cell carcinoma, although rare, is aggressive and can also be caused by too much UV exposure.This does not mean people have to avoid the sun altogether. And the good news is that, according to Cancer Research UK, the vast majority of skin cancer cases are preventable.Avoiding sunbeds and being safe in the sun is by far the best protection against skin cancers such as melanoma, the charity says.Covering up with clothes and wearing a wide-brimmed hat and UV-protective sunglasses is also advised. Furthermore, they say sunscreen of at least SPF 30 should be applied generously and reapplied regularly.