There is real value in looking after your lips at home. That said, it will not rebuild what age has taken. Keep them hydrated and use a balm with an SPF. The lip skin burns and ages faster than most people expect. Then exfoliate gently so the surface stays smooth. If you smoke, stopping is the single kindest thing you can do for the skin around your mouth.
Where home care hits its ceiling is volume and shape. The over-the-counter lip plumpers sold on the high street work by mildly irritating the lip. So it swells for an hour or two. That is a temporary sting, not new structure, and it does nothing for a blurred border or an asymmetry. The skin around the lips can genuinely be improved with medical-grade skincare, but the lip body itself needs a clinic. One honest caution matters here. If you get cold sores, an active one rules out filler until it has cleared. And any lump, ulcer or patch on the lip that has not healed within three weeks needs attention. That is a job for your GP or dentist, not a cosmetic clinic. Everything else, our team is glad to look at.