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.
They're not always doubled. People often write xo, and sometimes xxxooo or just xxx. xoxo is just one variation on the theme. â Caleb Apr 11 '11 at 11:27. @Colin Fine: I've never seen O used alone, but X yes, you're right. xoxo is very spread, though.