The mandarin orange is also known as the Mandarin. Mandarins are smaller and less spherical than common oranges. Mandarins are generally peeled and eaten fresh. The oil of mandarin oranges also improves the circulation of blood and lymph, particularly below the skin, which keeps the skin rejuvenate and looking young and vibrant. This improved circulation also creates warmth and provides relief from rheumatism and arthritis. This also aids growth and boosts immunity.