Can it be skin cancer?

[SUPERXERO]

http://i.imgur.com/WfaL7JZ.jpg

[Masqued]

Very unlikely :)

Unless it came up overnight?

[SUPERXERO]

It bin on my body has long i can remember

[countrygirl]

Looks like a giant freckle to me or one of those really flat moles but colour wise looks very healthy.
If it gets alot bigger, starts to change colour or bleed then see your Dr as this is the advice always given for any skin blemish.