This is not as uncommon as you may think and questions like this one come up on this forum quite regularly.Grey hair or a single grey hair in a child is usually an inherited tendency. In other words there is someone in the family who has developed grey hair at an early age. Sometimes this can happen out of the blue and there is no obvious cause. As long as he only has one or two grey hairs then all is well. If he develops any more grey hairs or patches of grey hair then he should be seen by a paediatrician as there are certain genetic conditions that will need to be excluded.
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