Can Raw Onions Under Your Feet Really Treat a Cold?

Claims that placing raw onion slices under the feet can cure a cold or draw toxins out of the body continue to circulate on social media. But there is no reliable scientific evidence that this home remedy treats colds, clears infections or “detoxifies” the body.

Colds are caused by viruses that infect the respiratory tract. Putting onions against the soles of the feet does not target those viruses, and there is no established mechanism by which onions pull toxins through the skin. The liver and kidneys handle much of the body’s waste processing and removal.

Onions can be part of a nutritious diet, but their nutritional value does not make them an effective treatment when placed on the skin. Likewise, any antimicrobial effects observed in laboratory research do not establish that onion slices worn under the feet can treat an infection in a person.

Keeping raw onion against the skin for prolonged periods may cause irritation, particularly in people with sensitive skin. Relying on the remedy can also delay appropriate care if symptoms are severe or worsening.

For an ordinary cold, rest, adequate fluids and suitable symptom-relief medicines can help people feel more comfortable while they recover. Anyone experiencing difficulty breathing, chest pain or persistent or worsening symptoms should seek medical advice rather than rely on an onion-based remedy.