(also termed recurrent aphthous stomatitis
, recurring oral aphthae
or recurrent aphthous ulceration
; from Greek: ἄφθα aphtha
, "mouth ulcer") is a common condition characterized by the repeated formation of benign and non-contagious mouth ulcers (aphthae) in otherwise healthy individuals. The informal term canker sores
is also used, mainly in North America, although this may also refer to any mouth ulcer.