If on your tongue, gums and mucous membranes of the mouth appeared small sores, visit your dentist immediately. Frequent appearance of sores in the mouth requires examination and treatment. Dentists in Maine will provide you with all necessary treatment. Currently, stomatitis is one of the most widespread diseases of the mucous membranes of the oral cavity. Stomatitis begins with increasing of body temperature to 39-40 degrees, increasing of the lymph node, on the inner side of the tongue and in the mouth appear small aching sores and plaque. Absence of treatment leads to postinfective disease.