In short. The early fullness is the carrier and the flat stretch after it is the treatment working. How to read the first three months without misleading yourself.
Key points
- Photograph the area in consistent light at the same distance and angle, and put the mirror away between appointments.
- The review at three months is where the course is judged, using photographs taken at the start, and it is the only comparison that removes memory from the question.
The first three months of this course are harder to read than any other part of it, because two different things happen in sequence and they look nothing like each other. Knowing which one you are looking at is most of what makes the wait bearable.
Week one: the carrier
The area is fuller within minutes of the injection, and it stays that way for some days. Swelling and tenderness at the injection points are expected, bruising is occasional, and firmness under the skin is normal rather than a nodule at this stage. The fullness is the gel the substance is carried in, and it is not collagen. Judging the treatment now, whether with satisfaction or disappointment, is judging something that is about to leave.
Weeks two to four: the flat stretch
The carrier is absorbed, the early swelling resolves, and the area may look much as it did before. Collagen deposition has started and is invisible. This is the point at which people conclude that nothing is happening and consider stopping, and it is a conclusion drawn from accurate observation and the wrong interpretation. Nothing looks different because nothing visible has been laid down yet.
What to do with the flat weeks
Photograph the area in consistent light at the same distance and angle, and put the mirror away between appointments. The review at three months is where the course is judged, using photographs taken at the start, and it is the only comparison that removes memory from the question.
Weeks four to eight: the first real change
The first genuine difference usually appears in this window, slowly and unevenly. Areas treated in different sessions do not develop on the same schedule, so a course covering more than one region can look asymmetric for a while without anything being wrong. That unevenness is a reason for patience rather than for a top-up, and adding material early is how an area ends up over-treated with no way to take it back.
Findings that are not part of settling
- A firm lump that is growing, is painful, or is visible rather than merely palpable under the skin.
- Redness, warmth, swelling or pain that is increasing rather than easing, or any fever.
- Skin over the treated area that changes colour, blisters, or breaks down.
The course is usually completed across three to six months, and the effect keeps building after the final session. That is why the honest judgement is somewhere between six and eighteen months rather than at the end of the course. The patient who understands the sequence — carrier, flat stretch, gradual build, late judgement — is the one who reaches the review with the course intact and a clear answer to whether they want more.
Frequently asked questions
Why does the treated area look unchanged a month after the session?
Because the carrier has been absorbed and the collagen your tissue is laying down is not yet visible. That flat stretch is expected rather than a sign of failure, and it is the point at which patients most often conclude that nothing is happening.
When does the first real change appear?
Usually somewhere between four and eight weeks, slowly and unevenly. It continues to develop after that, which is why the total effect exceeds what was visible at any single visit and why a fair judgement belongs months later rather than in the first fortnight.
Should I take my own photographs?
It helps, provided they are consistent. Same light, same distance, same angle, and the same expression. Standardised photographs taken at the clinic are the reference, and the point of them is to remove memory from the judgement, which is unreliable in both directions.
Risks & Limitations
- Irreversibility: there is no dissolving agent for this substance. A lump, an asymmetry or an over-correction is managed over time, with injected treatment, or occasionally by removal, and never switched off.
- Nodules and granulomas — firm lumps or an inflammatory reaction that can appear weeks or months after treatment and may need assessment and treatment rather than simply resolving.
- Unevenness or over-correction. This substance is placed in an area that cannot be dissolved, so over-treatment is harder to correct than under-treatment.
- Firmness under the skin in the first weeks, which is expected and usually settles, but does not always.
- Infection or inflammation at an injection site, which needs prompt assessment rather than waiting.
- Bruising, swelling, tenderness and occasional headache after treatment.
- The volume visible on the day is the carrier rather than the effect. The result develops over months and cannot be judged early, it is not permanent, and the area continues to age.
When to Seek Care
- A firm, growing or painful lump at or near an injection site, appearing weeks or months after treatment — this needs assessment even when it is not painful.
- Redness, warmth, swelling or pus at an injection site, or fever.
- Skin breakdown, blistering, or a dusky or mottled patch over a treated area — seek care immediately.
- Increasing pain, or pain out of proportion to the injection.
- Difficulty breathing, facial swelling or a widespread rash — possible severe reaction; seek emergency care immediately.
References & Further Reading
- American Academy of Dermatology (AAD) — injectable and skin safety information
- American Society of Plastic Surgeons (ASPS) — injectable treatment guidance
- U.S. Food and Drug Administration (FDA) — approved injectable products and safety communications
- National Medical Products Administration (NMPA, China) — approved product status
- Chongqing West District Hospital — Plastic Surgery & Aesthetics Medical Center
This page is patient education, not medical advice, and it does not cite individual studies. Discuss your own case with a qualified clinician. To arrange an assessment at Chongqing West District Hospital, see Contact & Consultation.