Can I prevent my top lip from disappearing and restore it back to normal?

I suggest to consult with an experienced cosmetic dermatologist to evaluate the underlying cause of your lip aging.  Fillers, lasers and peels do well in this area. Best, Dr. Emer

I appreciate your concern, I would recommend conservative lip augmentation with Hyaluronic Acid, like Juvederm plus. This is a temporary fix, but a good place to start, to see if you like the result. Another option is fat transfer which is more permanent. Seek out a board certified plastic surgeon in your area, Good Luck!

Thank you for your question. Looking at the photo you have
posted it looks like you have extremely dry dehydrated lips, and the volume
loss you are seeing is most likely related to this. It would probably be best to
see a Dermatologist to see what is going on with your skin and lips and ensure
there is no medical cause. While fillers will help improve the volume, it won’t
likely help with the dryness issues your having. Also make sure you are drinking
6-8 glasses of water daily to ensure hydration. Good luck.

Please consult an expert to understand what is happening with your skin and the lips.  It could be that you need fillers and other treatments such as oxygen facials to help restore the balance.  Best, Dr. Green