I have a very small looking mouth and lips. would injectable fillers be able to bulk up my lips and make the overall lip line appear longer?

Plastic surgeon: If you're considering collagen injection or lip implants, it's best to see a plastic surgeon.

Fillers bulk lips: Yes, a lot can be done with injectable fillers to improve the appearance of the lips. I i would caution you that you are young and would not in general recommend doing much of anything at this point. If it it really important , you may want to see a facial plastic surgeon for a more permanent solution, rather than having injections of absorbable fillers every 6-9 months.