Sore mouth.
 

I started chewing my lip about a week ago, it's only been a few times; about once every day or so for ten minutes for a time (the inside, enough to draw blood), and since I started, the vein on one side has been sticking out, and when ever I touch it with my tounge, it stings a bit, and was quite painful to begin with, particularly if I'm eating. It's gotten better a fair amount since I stopped a day or so ago, and any bruising has gone.

I was just wondering if I should worry at all at the fact the vein is still sticking out?

It doesn't cause me much discomfort now though, and I'm pretty sure it'll subside in a week or so at the most.

Thanks anyway.

In short, yes. If that occurs, especially if the structure of the 'vein' (if that's what it is) is damaged then it is very easy for bacteria to get into your blood supply. Though, depending how the vein is exposed, blood supply may have been cut off to it by now causing less of a threat. It is best to get it looked at as you expose a vein you would have to have caused quite a bit of trauma to the surrounding tissue which is as well as to check whether it is a vein and see what they want to do to treat it. It is best that if something like this happens again you get it looked at ASAP

I didn't mean sticking out as in out of the skin, more like swollen, right the way under my gum.

Thanks for your concern though.

It's probably just one thats broken a little and has bruised then. Try not to bite it and it should be fine in a few days