Could cold sores appear on the tongue?

It is possible. First HSV infection may be inside the mouth, but cold sores generally appear outside the mouth on the lips.

Related Questions

Could cold sores appear on the tongue in a healthy young adult due to poor hygiene?

Not usually. Only one "cold sore" type can appear on the tongue, and that is herpes. As this is a virus, something has to set it off or allow it to occur. If your poor hygiene is a reflection of you being run-down and your immune system being weakened, then it is possible. But typically we do not see a frequency of herpes on the tongue due to poor hygiene. Hope you get things cleaned up. Good Luck. Read more...