This video explains the home remedy of applying Vicks VapoRub to the soles of the feet to alleviate nighttime coughs and congestion. Dr. Mandell details the active ingredients in Vicks, the physiology of the feet's nerve endings, and how stimulating these nerves can influence the brainstem to suppress the cough reflex. He also provides instructions on how to apply the remedy for maximum effectiveness and advises consulting a healthcare professional if symptoms persist.