Citrus oils are easy to incorporate as they are pleasing and generally well-liked (which can’t be said about all oils). They generally have an uplifting and clearing effect. They are literally happy oils. Lime oil in particularly useful to regulate the spirit of the Liver (the Hun).
The nature of the Hun is to expand and to dream. Not remembering your dreams is a dysfunction of the Hun. A healthy Hun is also responsible for our ability to dream in our lives and to have a vision. Anger, depression, stress, and addictions all signify a disharmony with the Hun.
Lime oil also has anti-viral and anti-bacterial qualities and tightens the skin.
An excellent resource for essential oils from a TCM point of view is Willmountain Essential Oils.