Apple cider vinegar is a popular home remedy for a variety of ailments. Its ability to destroy bacteria may help clear up your mouth ulcer. However, the vinegar may sting when it comes in contact with the ulcer, so try another remedy if you're experiencing pain. Mix one teaspoon of apple cider vinegar into one cup of water and rinse with the solution for 30 seconds to one minute. After spitting, rinse your mouth with plain water to prevent the vinegar from damaging your tooth enamel. Only rinse with apple cider vinegar once a day.
When you're looking for how to get rid of mouth ulcers naturally, you'll see there are a variety of treatments available. What works for one person may not work for another, so don't be afraid to try different natural remedies. If your ulcer doesn't heal or it worsens, see your dentist or doctor for professional care.