<prompt> Aphthous ulcers known asCanker soresMarjolins ulcerCurlings ulcerCushing ulcers  <response>: Canker sores 554,114, 211, 564, HM 580- Basic pathology 8th Aphthous ulcers Canker sores - Commonest form of painful oral ulcers In shock due to burns, acute stress ulcers of the stomach or duodenum may occurs and are known as Curlings ulcer Squamous cell carcinoma developing in an old bum scar Marjolins ulcer Intra cranial lesion e.g. Head injury Cushing ulcers developing from hyper acidity following vagal stimulation 