What hyper vitamin A symptoms are and what are the risks?

In addition to the colleague's answer, Hyper Vitaminosis A presents the following symptoms, according to an article published on emedicine:

Anorexia, vomiting, irritability, stomach pain, drowsiness, and even mental problems.

You get HyperVitaminosis by eating disbalanced portions of the food groups that have Vitamin A (which were mentioned in the previous answer) or by disbalances in your thyroid.