Pure Onion Essential Oil (Allium cepa) Anthelmintic, antirheumatic, anti-infectious, bactericidal, antispasmodic, expectorant, fungicidal, tonic (digestive), carminative, depurative. Used for emotional clearing especially for anger and as a massage for rheumatism. Common uses of onion oil are for relieving symptoms of allergies including itchy eyes, watery eyes, headaches, runny nose, congestion, and fever. Can also aid in the relief of throat dryness, hoarse voice, and laryngitis. Very effective on clearing up earaches, it takes as little as one drop to relieve pain. Can also regulate the tear glands if an abnormal about is being discharged onion oil recommended. Aids in relieving pain from toothaches as well.