I've recently had two black bruise looking marks appear on both my big toes. They're painless and black in colour. I do not remember causing any trauma to my toes. I have seen the gp who is sending a picture off to a dermatologist. I have had a look online what I can see  online and it says it could be a number of things one in which could be melanoma. I am also having bloods taken in a weeks time but I am very concerned.

any advise would be great, thank you