Think about lung cancer symptoms and you'll be forgiven for imagining hacking coughs and shortness of breath, but there is one telltale sign that is a lot less obvious. However, keeping an eye out for it could give you an early tip-off of the disease and greatly improve your chances of surviving it.
According to the Mirror, lung cancer can spread quicker than other forms of the disease with nearly 40,000 people being diagnosed every year in the UK. And often signs don't turn up until after the cells have spread through the body.
But there is a way of getting that early warning of a developing problem, and it's as simple as putting your fingernails together. Here's what to do...
