Mouth ulcers are small sores that form on your gums, lips, tongue, inner cheeks or roof of your mouth. Lots of different things can cause them, including minor injuries, hormonal changes and emotional stress. Many mouth ulcers go away on their own. Others may require treatment.#ENTdoctornearme#eardoctornearme#entclinicnearme#throatdoctornearme#eardoctornearme