Skin tightening methods?

[Sakl]

Whenever I push against my cheeks with my fingers and let go I literally get hollow cheeks temporarily, it means that it isnt a problem with fat and rather something with skin tightness.

What skin tightening methods are there to use on me?

 

[fattofat]

Anything that promotes collagen, retinoids, ghk, vitamin c, niacinamide, etc