My grandaughter is 2 1/2 years old and bumped heads with another child in daycare this past Monday. Later in the day she started vomiting and was lethargic. My daughter took her to the emergency room and was told she may have suffered a mild concussion. She has a bruise still under her left eye. She has not vomited since Wednesday but has started again as of this morning. She is a very active child so when she acts lethargic it is cause for concern. She is not running a fever or showing any other symptoms.