Ginger essential oil is not allowed to contact the skin directly and needs to be diluted with base oil. It is photosensitive, so it is not recommended to use it in the daytime.

Dilution method: base oil amount (ml) divided by 2= maximum drops of essential oil (I gave you the dilution ratio of high-purity essential oil, because you can't buy high-purity essential oil in the market, you can reduce it appropriately).

For example, 20ml of base oil needs about 10 drops of essential oil (this drop number is the total drop number containing different essential oils).

There are many kinds of base oils to choose from according to different skin types of individuals. Generally, you can buy base oil where you buy essential oil. You can ask the clerk to introduce you then. There is no way to dilute them with water.