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It is a bone
A hard bump at the base of a toe could be a bunion. There are several remedies available including shoe inserts.
Herpes
i think if you have a bump on the back of your skull, you are getting a tumor.
a penis
Just don't press to hard on that hand.
it grows up inside the bump and it will turn it red and all dry and like if it get's to hard it will be to hard for it to get off your face and then the bump starts to grows:*(
Sebaceous Cyst.
A hard painless subcutaneous bump that moves on a finger could be a callus. It is important to seek medical attention as soon as possible.
Bump the top of the cave to the left. A worm will fall if you bump hard enough
from the break.
a hard bump inside your mouth.