I have a bruise? I think it is a bruise on my finger.  I did not have it last night,and when I woke up it was there. It has a lump or something under it.  It is very dark and looks like it should be painful, the thing is it does not hurt at all!! I cannot feel a thing even when I rub on it. Should I be concerned, it has gotten gradually darker all day, but that could be because I keep touching it.
Hi.based from your description, it could be a callous formation. Its tissue thickening on the area exposed or usually in contact with something. Some would resolve spontaneously upon removal of the insult, others will just remain. No medical nor surgical intervention necessary if it doesn't affect your daily function and if it is not growing in size. Hope this helps. Good day!!~ Chat Doctor.