Essential oils are commonly applied in three main ways. They can be used topically on the skin for local or broader absorption, inhaled directly from the hands or through a diffuser, and some may be taken internally. Inhalation is often used for relaxation or breathing support, while topical use is popular for targeted areas. Internal use requires extra caution because not all essential oils are safe to ingest, so it is important to check the product guidance carefully before using them that way.