What happens if a child produces too much dopamine?

See below: Generally speaking we don't measure Dopamine levels. There are diseases where the cells that produce Dopamine start dying (i.e. Parkinson disease). There are diseases where the treatment are anti-dopaminegic medicine (i.e. Schizophrenia, hyperkinetic movement disorders such as huntington disease). I'm not sure that there is any condition where we say the Dopamine level is too high.