Onion is a plant. The bulb of the onion is used to make medicine. Onion is most commonly used for scarring. It is also used for other skin conditions and to prevent cancer and heart disease. It has many white layers on its inside which have a strong, sharp smell and taste.

Onion is a plant. The bulb of the onion is used to make medicine. Onion is most commonly used for scarring. It is also used for other skin conditions and to prevent cancer and heart disease. It has many white layers on its inside which have a strong, sharp smell and taste.