To be applied on the skin : Yes ++++ (undiluted on a small surface, diluted in vegetable oil in case of repeated applications, on a larger surface or if the skin is sensitive).
To be swallowed : Yes ++
To be inhaled : Yes ++++
Precaution for use: As with all essential oils, common lavender oil is prohibited during the first 3 months of pregnancy. It should not be used during breastfeeding.
However, perfectly harmless, it can be used on babies (from 3 months old), young children, all ages, even undiluted on the skin.
Indication: Essential oil.