Colds are a virus. A cold gets in your nose and your sinuses and starts to duplicate there, producing a lot of mucus. Many will experience postnasal drip—mucus dripping down the back of the sinuses into the throat—when they go to bed. The mucus contains a virus or bacteria. When it reaches the back of the throat, it causes swelling and inflammation and can even spread into the ears.Taking one tablespoon of structured silver three times a day, and spraying intranasally four or five times a day, will help reduce congestion and inflammation. Mouth rinse, ear drops, eye drops, nose drops, and throat spray can all be used as well.