Most bumps to the head are minor, and common symptoms that can appear are:

* Headache

* Nausea

* Dizziness

You should seek medical help if any of the above symptoms change into any of the following:

* Severe headache

* Excessive drowsiness (awaken the child at least twice during the night).

* Nausea and/or vomiting

* Double vision, blurred vision, or pupils of different sizes.

* Loss of muscle coordination such as falling down, walking strangely, or staggering.

* Any unusual behavior such as being confused, breathing irregularly, or being dizzy.

* Convulsion