Reed diffuser spilled all over childs hands... then washed hands! is it harmful?

Aromatherapy: depends on the essential oil that you purchased as essential oils are highly concentrated they can cause skin irritation however they are usually diluted to reduce such irritationpjototoxic can occur with citrus peels , lavender and tree tea have been implicated in causing breast enlargement however this study only had 3 children so do not worry it seems it can cause skin irritation for the most

Should be fine: since the hands were washed off. May get a rash if it irritated the skin.