Canker sores have a myriad of causes. Too much acid in the mouth is the number-one cause. The tissue in the mouth gets destroyed by stomach acid, too many sugars, and bacterial or viral infections.A pH-balanced structured silver can help improve the issues quickly. Hold one ounce of pH-balanced structured silver liquid in your mouth for six minutes and then drink it. Repeat this process twice a day. Silver gel can also be applied topically to the wound.If the canker sore is a result of the herpes virus, the sooner you get the gel on the wound, the sooner you can stop the virus from replicating and getting worse. You can expect the wound to improve twice as fast with structured silver gel applied to the canker sore than if it were to run its course normally.