What are some ways one could prevent canker sores from forming? and on another note would there be any way to remove already formed ones?

Once the virus is established, I would treat the lesions as soon as they occur, Very difficult to treat so stay healthy, hydrated , healthy nutrition , exercise and rest.

EATING AND DRINKING FOODS AND LIQUIDS THAT HAVE A LOW ACIDIC CONTENT. LESS STRESS AND GOOD ORAL HYGIENE ARE FACTORS THAT CAN PREVENT CANKER SORES. ONCE FORMED THEY TAKE 5-7 DAYS TO GO AWAY. IT IS A VIRUS THAT CAN BE TREATED WITH OVER THE COUNTER MEDICATION TO RELIEVE ANY PAIN.