Read this in Hindi Marathi Mouth ulcers or canker sores are small painful lesions that develop in your mouth or at the base of your gums. These sores make it difficult for you to eat drink and talk. Mouth ulcers can be quite painful. Sometimes such an ulcer indicates a deficiency of certain vital nutrients and therefore taking multivitamin supplements can be useful. But the effects are not immediate and it may be a few days before results start showing. There are many reasons why these ulcer happen and just as many ways to treat them. Here we give you 5 quick home remedies to