I worked in a dental setting for years, and what you have described sounds like it's an autoimmune thing going on.

These things can be triggered by viruses and whatnot. Personal question, how are your number 2 toilet habits? Reason for asking, Crohn's can manifest in the mouth like this. The eye thing could be totally unrelated, or if it's a general autoimmune thing, it could be related. But your gp would be batter placed to discuss this with. But yeah, the mouth thing has an overreacting immune response written all over it. That said, you can have 2 different things going on at once, so the lump could be unrelated and it's always best practice to get any lump looked at that lasts for more than 2 weeks. Any lump, bump, lesion, ulcer, red/white patch that doesn't disappear within 2 weeks needs looked at. Most turn out to be nothing, but they simply have to refer due to how fast cells grow in the mouth.

Hi, thanks so much for the reply and no problem with the ask but no problems with no 2. Very regular and regular consistency and no pain or bloating or anything .

The consultant did mention autoimmune possibilities but I'm just so confused as I have no other symptoms I'm aware of other than what's happening in my mouth.

I'd put my mortgage on it that it is an immune system thing. Whether it's temporary or not, i dunno. But viruses, even a common cold, can make your immune system go haywire. Sometimes in life your immune system just goes crazy for no apparent reason, or you could have had an autoimmune condition that was just waiting to be triggered into life. There are lots of autoimmune conditions, so you might need further testing on that front.