Our expert says:
It could be caused by bacteria on the skin. We all have bacteria living on the skin but in some cases the level of bacteria increase to abnormal high levels. Because they produce sulphur this can cause a onion type smell. Try using an antiseptic soap like Hibiscrub to wash your hands with, be careful that it does not come into your eyes. If your hands are very sweaty you can try something like Driclor on your hands.
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