Lime is often used for its uplifting and invigorating properties. When diffused, the sweet, clean citrus aroma can clear your mind and encourage mental energy. It can also help support a healthy immune system. Add to a cleanser or carrier oil to help with oily skin. Lime increases appreciation for life, determined attitude, courage and feeling emotionally safe. Lime is useful for those who are apathetic, resigned, in grief or discouraged.