The general rule is six months after eruption of the first tooth. Taking your child to the dentist at a young age is the best way to prevent problems such as tooth decay, and can help parents learn how to clean their child's teeth and identify his or her fluoride needs.
Retching (also known as dry heaving) is the reverse movement (peristalsis) of the stomach and esophagus without vomiting. It can be caused by bad smell or choking, or by withdrawal from some medications after vomiting stops.
Retching can also be as a result of an emotional response or from stress which produces the same physical reaction. The function is thought to be mixing gastric contents with intestinal refluxate in order to buffer the former and give it momentum in preparation of vomiting.