Loose neck skin happens when the collagen and elastin holding it firm become stretched or depleted, either gradually with age or quickly after significant weight loss. The skin no longer retracts to fit the contours underneath.
CO2 laser can improve mild to moderate laxity by stimulating new collagen. It does not lift skin the way surgery does, and being clear about that difference matters before you spend anything.
Important clinical note. CO2 laser resurfacing is an invasive, higher risk non-surgical cosmetic procedure. It carries risks including scarring, infection, changes in skin pigmentation and prolonged redness. Results vary significantly between individuals depending on skin type, age and lifestyle, and are not guaranteed. You are encouraged to seek a second opinion from an appropriately qualified health practitioner. This page is general information, not medical advice.
Why the neck goes first
The neck tends to show change earlier than the face, and there are structural reasons for it rather than bad luck.
| Factor | Why it affects the neck |
|---|---|
| Thinner skin | Less structural support than facial skin, so change shows sooner |
| Fewer oil glands | Less natural support for barrier and texture |
| Sun exposure | Frequently missed by sunscreen routines that stop at the jawline |
| Rapid weight loss | Skin that stretched over time does not always retract to match |
| Movement | Constant flexion, and increasingly time spent looking down |
How CO2 laser works on it
The laser targets water in the skin cells, removing thin surface layers while heating the deeper dermis. That controlled injury triggers the body’s wound healing response, which is what drives the tightening and texture change.
Existing collagen fibres contract from the heat, giving a subtle immediate effect. The more meaningful change comes over the following months as fibroblasts produce fresh collagen and elastin, which helps the skin sit better over the contours of the neck.
Where the honest limit sits. Resurfacing improves mild to moderate laxity, texture and fine lines. It does not remove excess skin or reposition underlying muscle. Significant sagging after major weight loss is generally a surgical problem, and no non-surgical device changes that.
What to expect
This is a resurfacing treatment, so there is real recovery involved rather than a lunchtime appointment.
- Redness and swelling for a period afterwards, with the neck typically slower to heal than the face
- Peeling as the treated surface layers shed
- Strict sun protection during healing, since new skin is vulnerable to pigmentation change
- Results building across several months rather than appearing at once
- Settings adjusted for neck skin specifically, which is thinner than facial skin
Other approaches suit different degrees of laxity. Skin tightening treatments and Ultraformer III work differently again, and an assessment decides which is appropriate.
Common questions
Will it fix loose neck skin after major weight loss?
Not if there is a significant amount of excess skin. Resurfacing improves quality, texture and mild to moderate laxity, but excess skin needs surgical removal. An assessment will tell you honestly which category you are in.
How long until I see a result?
There is a subtle immediate tightening from collagen contraction, but the meaningful change develops over several months as new collagen forms. It is not a treatment that shows its result on the day.
How much downtime is there?
Enough to plan around. Expect redness, swelling and peeling, and the neck usually heals more slowly than the face. Your practitioner will give you a realistic timeframe for the settings being used.
Is it suitable for all skin types?
It needs care on darker skin, which carries a higher risk of pigmentation change after resurfacing. Settings are adjusted and the approach is more conservative. Raise any previous reaction to laser at your consultation.
The short version
Loose neck skin comes from depleted collagen and elastin, and the neck shows it early because the skin is thin and often unprotected. CO2 laser stimulates new collagen and improves mild to moderate laxity and texture over months. It does not remove excess skin.
An assessment is the way to find out which applies to you. Advanced Cosmetic Medicine is in Kent Town, minutes from the Adelaide CBD. Call (08) 8239 0431 or book a consultation.
About the author
Dr Rahma Targett (MED0001642145), Registered Medical Practitioner, General Registration. Dr Targett is a medical practitioner at Advanced Cosmetic Medicine. Medically reviewed and authored by Dr Rahma Targett.
