19. Treat oral thrush
Oral thrush, caused by an overgrowth of candida, can be uncomfortable and persistent. Apple cider vinegar’s antifungal properties make it an effective remedy. Mix half a cup of ACV with one cup of water and use it as a mouthwash. Gargle and swish the solution around your mouth for a few minutes to reduce symptoms. Repeat this process daily until the infection clears.