Onions are known to contain quercetin (an antioxidant) and phytochemicals, both of which may help the body by breaking up the mucus in the chest and head. [2] X Research source A. Cavender, Folk medical uses of plant foods in southern Appalachia, United States, Journal of Ethnopharmacology, Volume 108, Issue 1, 3 November 2006, Pages 74-84.

You can also add fresh ginger—about one-quarter cup (roughly 28 g)—to help combat the infection and reduce fatigue, as ginger has shown to have antiviral properties. [6] X Trustworthy Source PubMed Central Journal archive from the U. S. National Institutes of Health Go to source Peel fresh ginger and either grate the ginger or chop it into very small pieces. [7] X Research source Herbal approaches to pathological states, Principles and Practice of Phytotherapy (Second Edition), 2013, Pages 140-182.

After removing the poultice, wash the area with soapy water. You can combat the smell of the onion by putting some lemon juice on the spot where the poultice was.

Leave the poultice on for 20 to 30 minutes.

Rest the poultice on your ear for 15 to 20 minutes. If you’re making the poultice specifically for the purpose of treating your earache, then you only need to finely chop 1 onion instead of 2.

Leave the poultice on for 20 to 30 minutes.

You are coughing up yellow, green, or brown phlegm. You experience wheezing or shortness of breath. You have a cough with a fever over 100 °F (38 °C). Seek emergency care if you cough up phlegm that is bloody or pink or if you have difficulty breathing or swallowing.

A fever of 102 °F (39 °C) or higher. Yellow, green, or bloody nasal discharge, especially if it’s accompanied by sinus pain or pressure and a fever. Bloody or clear nasal discharge after a head injury.

A fever or chills Swelling around the affected ear(s) Fluid leaking out of the ear(s) Hearing loss or changes Severe throat pain Vomiting