A HORRIFYING time-lapse video reveals how a tiny brown line on your finger can morph into stage four cancer.
Though it’s rare for skin cancer – including melanoma – to develop under and around your fingernails and toenails, it does happen.
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It may look like a brown or black band on your nail, which can be easily mistaken for a bruise.
Melanoma is the fifth most common cancer in the UK, with about 16,000 people diagnosed with it each year.
Melanoma UK warns that cases are rising too.
This type of cancer that grows under the nails is called subungual melonoma.
Aside from a line, the disease can also look like irregular mark under the nail.
