Melanoma skin cancer diagnoses across all age groups have reached a record high - with 17,500 people diagnosed each year in the UK.
Cancer Research UK pointed to a particular rise in cases among adults aged 55 and over. Case rates among this age group have risen by 195% since the 1990s.
The charity says the boom of cheap package holidays in the 1960s has been linked to the rise in this type of skin cancer among older adults. It added: "The rise in rates in over-55s is likely to be linked to trends to have tanned skin and the cheap package holiday boom dating from the 1960s before people became more aware of skin cancer."
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Other factors could also be at play, including a growing and ageing population as well as more people getting their skin checked when they notice changes. The charity has estimated that across all age groups, melanoma skin cancer cases could increase by around 50% over the next 20 years, hitting a record 26,500 a year by 2040.
But despite the rise in cases, deaths from the disease are decreasing. Early diagnosis and treatment means that more people than ever will survive the disease.
Cancer Research UK's chief executive Michelle Mitchell said: "Our new analysis paints a mixed picture for cancer patients and the staff who care for them - while it's promising that more people are seeking treatment for skin cancer earlier and survival is improving, it's alarming that cases of the disease could soar over the coming years. Melanoma is the UK's fifth most common cancer, and we know that 86% of these skin cancers could be prevented.
"It's important to take care in the sun and to contact your GP if you notice any unusual changes to your skin - it's not just changes to a mole that matter, it could be a sore that doesn't heal or any unusual changes to an area of your skin. Spotting cancer early can make all the difference."
Here are the early signs to look out for when monitoring your moles. If you notice any of these symptoms, you should make an appointment with your GP to get the mole checked as a precaution, reports The Mirror.
Uneven shape
The NHS says normal moles are usually round with smooth edges. Melanomas are often an uneven shape. They may have two different shaped halves and uneven edges.
Mixed colours
Normal moles are usually only one colour however melanomas are often a mix of two or more colours.
Size
Melanomas also tend to be bigger, often more than 6mm wide.
Change to shape
Experts say you should consult your GP if you notice a new mole or changes to an existing mole.
Bleeding/itching
Other signs to look out for include moles that are swollen and sore, bleeding or itchy.
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