stevegee,

There is a lot of tissue over the skull with lots of nerves that can get bruised and feel painful without causing much trauma to the brain. If you did not develop any dizziness, nausea, severe headache or such, an ER visit will just be undue stress and expense. From what I have discovered, most health plans have a $300 or more copay for an ER visit. If this was at work, Work Comp will pay for you to get checked out but may be problematic for your employment status. But, if it was at work, you should at least file a notice/report of injury for your employer's record.