Canker sore. In some cases, the exact cause of a canker sore is unknown, but trauma or injury to the mouth or oral soft tissues may be the culprit. Other possible causes are food sensitivities, spicy, salty or acidic foods, vitamin B deficiency, hormonal shifts and stress. Cold sore.
What does xoxo mean? Hugs and kisses or xoxo is a term used for expressing affection or good friendship at the end of a written letter, email or SMS text message.
From this, at least we know the âXâsâ meaning âkissesâ preceded âOâsâ as âhugsâ as there are no such references up to this time of the latter, so thatâs something I guess.If you werenât satisfied with the lack of definitiveness of the âXâ part of things, youâll be even less so with the âOâ symbolizing the hug.e canât be 100% sure why or how XOXO ultimately came to mean âhugs and kissesâ, but we do at least have a reasonably good theory to work with on the âXâ part. Signing letters with an âXâ dates back to the Middle Ages.