2nd opinion - 30 years old with smoker lines around the upper lip.

Thank you for your questions.  The fact that you are seeing lines at your early age tells me that it's genetics + lifestyle that are contributing to them forming so early.  Dermal fillers, if chosen correctly and injected right, definitely soften their appearance. The next best thing you should do is Ultherapy Skin tightening around the mouth or consider laser treatments like Fraxel or PicoSure and even Microneedling. You need all the modalities to combat loss of collagen and elasticity as well as volume in your face, and all the listed above modalities are aimed at helping prevent the signs of aging and slow them down.  Hope this helps.  Best, Dr.Avaliani

Upper lip lines are common complaint in women of all ages. The muscle that wraps around the mouth and helps you use a straw, pucker or smoke creates these lines. I always recommend smoking cessation as this will not only improve your overall health but also improve your skin quality and decrease the likelihood of these lines getting worse. 
Options for treating these lines include fillers, botox or skin resurfacing (laser or chemical peels). For someone your age, I would try to eliminate the cause of the lines, the smoking, and treat the over active muscle with Botox. This requires a very small dose because there are risk of weakening the muscle too much and causing drooling. If botox doesn't completely resolve the issue, you could add filler to the deeper lines. 
Resurfacing is generally preserved for more advanced sun damage but that could be an option as well. 
Ultimately, you should seek a consultation with a board certified plastic surgeon so you can be properly examined and the best option can be chosen for your needs 

Another option that is harmless and fast acting is Botox, although it won't last too long and will need to be repeated every 4 to 6 months.