What this site is for
This is a patient decision guide to injected collagen, published by Chongqing West District Hospital, a tertiary general hospital in Jiulongpo District, Chongqing. It narrows the filler pages of this cluster rather than repeating them: what a filler is, whether to have one at all, and how the substance classes differ are answered there. What this site adds is the part that is specific to this class, which is the shape of the commitment. The change arrives across a course of sessions spaced over the first year rather than at the appointment, and there is no dissolving agent for it, so the first session carries a weight that a reversible class does not put on it.
The distinction this site is built on
Injected collagen is a filler. It is placed to add volume and it is broken down over months. A collagen stimulator is a different treatment: poly-L-lactic acid, polycaprolactone and calcium hydroxylapatite are placed to provoke your own tissue, the change they produce is your own collagen, and the course, the risks and the complications differ from this class at every point. The two are commonly described as if they were one subject, and much of what is written about them is therefore wrong about both. Everything here turns on keeping them apart, and where a complaint is better answered by a stimulating material, this site says so and links rather than stretching its own subject to cover it.
What it deliberately does not do
It does not name products or brands, quote prices or dosages, or promise a result. It does not describe injection technique or explain how the material works, because the decisions a patient has to make are about the course, the ceiling and the record rather than about the needle. It does not present a gradual result as a lesser one, and it does not present stopping as a failure. It does not describe a lump as something to be dissolved, because there is no dissolving agent for this class, and it does not present an operation or a stimulating material as a consolation prize, because where either is the honest answer that is what the assessment will say.
How the content is reviewed and corrected
Ke He, MD, Deputy Director and Head of Skin & Laser Aesthetics, is the responsible physician. Every guide is reviewed against her clinical judgement before publication and reviewed again on a twelve-month cycle. If you find something unclear, out of date or wrong, the contact page explains how to tell us, and corrections are made to the page itself.