Lots of things: Kicking
Fracture of the basal portion of the skull causes mastoid bruising.
same thing that causes bruising everywhere. crushed blood cells.
This might be caused by a bug bite or bumping yourself.
Is Used for severe blood Bruising under the skin after certain types of Surgery. Also Used for many ways of bruising, such as falls or bumping any part of your body that causes you to have a severe looking bruise.
damage to blood vessel
I doubt very much if pulling your hamstring causes bruising, because bruising is bleeding under your skin, so if it's bruised you should get that checked.
There have been several side effects reported from Bosley hair transplants. The most common is that the transplant does not last very long. The other is that the transplant causes numbness and can take many weeks for feelings to return.
i have knocking in the knee after total knee replacement is this normal
No. Bruising is usually a result of a heavy hit which causes underlying blood vessels to rupture. Cancer is caused by a 'mutation' in a persons genes
I would say as soon as possible because whiplash is generally just a temporary bruising of the muscles in the neck. It causes pain in the neck from this bruising but it always goes away soon. If you have more serious injuries you need to find out about it and have it treated. This would include problems with the vertebrae which may or may not include need for surgery.
Period (mensturation) Cancer Overstimulation Bruising
Low iron or swollen veins