Canker sores, also referred to as aphthous ulcers, as the name indicates, are small white or yellow sores seen in the mouth. It is painful, especially while eating hot foods. Canker sores last for a week or two. They are seen to occur in the mouth and fails to react to any method of treatment. Pain killers available commercially provide relief from pain. An anti bacterial mouthwash is also effective against canker sores. Placing ice cubes on the affected area proves beneficial. Diluted hydrogen peroxide is used as a mouthwash. Gargling with salt and water during pregnancy fails to have any adverse effect. Canker sores are common in individuals undergoing chemotherapy treatment for cancer. Acidic and spicy foods are avoided. Foods that are sharp like chips and potato wedges might hurt or poke the blister. Dabbing milk of magnesia on the sores is useful. Gargling copper sulphate is an age old remedy followed by many. Diet rich in B complex vitamins and zinc is recommended. Oral drugs and mouthwashes also prove beneficial. Topical application of slippery elm and licorice root is helpful. Commercial ointments are equally effective against canker sores.
answered by Dr C