According to Ayurveda, Mustard oil has Kapha balancing and Ushna (hot) properties. These properties help to reduce the symptoms of cold when applied externally on the chest and back[20]. Here are some ways to use mustard oil for cold: You can use it by adding camphor and applying the mix directly to the chest. You can try adding some mustard to boiling water and inhaling the steam before you hit the bed. You can also directly apply Mustard oil into the nostril to get relief from the nasal blockage or dryness in the nose.