Hi, I'm a 20 year old male.
About two weeks ago I noticed a faint darkness on the top of my hand right above my knuckles. They look like two brown circles one the size of a dime and the other the size of a nickel. The spots grew slightly darker in the last week and now are really noticeable. They look like bruises but I know they are not. I also have one of the same looking spots on my other hand on top of my middle finger.

They are definitely not moles I have not been exposed to sun recently. The spots are not raised, they are flat with my skin.

Should I get this checked out by a doctor?? Does it sound serious? These are not the symptoms of cancer are they? Please let me know as soon as possible.

Thanks.