<s>[INST] I've had a pimple bump on my lip for years now and was wondering what it could be? i cant pop it and it doesnt really change size or puss or anything. [/INST] It could be a submucous cyst which means a collection of mouth secretions.They look pink and are soft and may disappear for a short while and comeback, Or it may be some other kind of swelling .In any case it needs to be examined to know what is it.See A dentist or a surgeon for opinion.With regards rahulchhajlani@rediffmail.com </s>