Necks where the platysma is active and visible, where bands stand out when the jaw is clenched, tend to get the most from neuromodulators. The horizontal creases in these necks are partly a compression problem and easing the muscle eases the compression.
Where they fall short
An etched line does not care whether the muscle beneath it is relaxed. Neuromodulators do nothing for skin that has already scored. Readers with fine, sharp necklace lines and a quiet platysma tend to see little change and are usually better served elsewhere.
Dosing on the neck is also delicate. The platysma helps with swallowing and neck flexion, and over-treatment can produce weakness or asymmetry that lasts as long as the product does. This is an area where injector experience matters more than product brand.
Hyaluronic acid fillers
Fillers add volume. For a neck crease, a soft, low-viscosity hyaluronic acid filler is threaded along the floor of the line to lift it level with the surrounding skin. The idea is the same as filling a depressed scar: remove the depth, remove the shadow.
Where they help
Etched lines and deeper folds with a defined floor respond to filler in a way they do not respond to anything else short of resurfacing. The change is visible immediately once swelling settles.
Readers often describe the line as still present but no longer catching light.
Where they fall short
Neck skin is thin and mobile, and filler placed too superficially or in too large a volume shows as a visible ridge or a bluish tint under the skin, a well-known effect of hyaluronic acid sitting too close to the surface.
Skilled injectors use small volumes and soft products and accept a partial correction rather than chase a perfect one.
Filler in the neck also tends to be metabolized faster than in the cheeks, because the area moves constantly, so the maintenance interval is shorter than readers expect.
Skin boosters
Skin boosters are uncrosslinked or lightly crosslinked hyaluronic acid placed superficially across the whole neck in many small deposits, rather than threaded along one line. They are meant to improve skin quality: hydration, suppleness, the way light reflects.
They are not meant to fill a specific crease.
Where they help
The crepey, papery neck with many fine lines and no single dominant crease is the booster's territory.
Over a series of sessions the skin tends to feel thicker and softer under the fingertips, and the fine lines read as less sharp because the surrounding skin has more give.
Boosters are also used as a base layer before filler, on the theory that better-quality skin drapes more evenly over anything placed beneath it.
Where they fall short
A deep fold does not fill from a booster. Readers with one or two prominent necklace lines and otherwise decent skin quality see less from boosters than from a targeted filler.
Boosters also require a series, usually three sessions, and the result builds slowly; anyone hoping for a visible change after one visit is likely to be disappointed.
PDO threads
PDO threads are absorbable sutures placed under the skin with a needle or cannula. Smooth threads are laid in a mesh to stimulate collagen.
Barbed or cogged threads have small anchors along their length and are used to reposition lax tissue upward before they dissolve over months. The thread itself is gone within a year or so; the collagen it provoked remains for a while longer.
Where they help
Threads address laxity, the loose drape of skin that deepens every crease by letting the skin fall into folds.
A neck where the skin has started to hang, where the horizontal lines are partly a consequence of slack, may see the creases soften as the tissue is supported.
Smooth threads in a mesh are also used purely for skin quality on the neck, overlapping with what boosters do.
Where they fall short
Threads do not fill an etched line. They do not remove excess skin; a neck with significant hanging skin is a surgical conversation, and a candid injector will say so.
Barbed threads in the thin skin of the neck carry a risk of visible puckering or a thread that can be felt or seen, and results vary more between injectors than with almost any other treatment covered here.
Reader reports on threads are the most polarized we receive.
Putting the four side by side
On the ground, the useful distinction is between the four problems a neck crease can be made of: compression, depth, skin quality and laxity.
Compression is the neuromodulator's problem. Depth is the filler's. Skin quality belongs to boosters, with smooth threads as an alternative.
Laxity belongs to threads, up to the point where surgery takes over.
Most necks have two or three of these at once.
That is why injectors so often propose a staged plan rather than a single treatment: a booster series first to improve the canvas, a neuromodulator if the platysma is active, then a small amount of filler along any line that remains.
Threads enter where laxity is the main complaint. The order is chosen to let each step settle before the next is judged.
In practical terms, the next point is about expectations. None of these four erase a neck crease. Each reduces one component of it.
A line that is shallower, softer and no longer catching light is a good outcome. A line that is gone is not a realistic one for most people.
Questions to settle before a consultation
Does the crease stay sharp when you tilt your head back and stretch the neck? If yes, it is at least partly etched, and depth or skin quality treatments are in play.
Do vertical bands stand out when you clench your jaw or say a hard "ee" sound? If yes, the platysma is active and neuromodulators belong in the conversation.
When you gently pinch the skin at the side of the neck, does it snap back or drape slowly? Slow drape points toward laxity.
How much sun does your neck take through the car window in a week? Everything above underperforms on skin that keeps burning, and Los Angeles commuters take more neck sun on the driver's side than they realize.
Here in Los Angeles
Los Angeles has one of the largest markets for neck treatments in the country, and the range of technique is as wide as the range of price.
Thread lifts in particular are offered by providers with very different levels of training, and local reporting, KTLA's among it, has covered both the growth of the market and the complaints that follow it.
Readers visiting the city for treatment, or planning a treatment around travel, can find the city's official visitor information through Discover Los Angeles.
More usefully, they should plan the healing window into the trip rather than around it, since neck swelling and bruising are visible above most collars.
Conclusion
The four treatments in this article are not competitors. They are answers to four different components of the same crease, and the first job is to work out which components your neck has.
A fold that flattens under stretch and a platysma that jumps when you clench point one way; a sharp etched line on quiet skin points another; a slow drape points a third.
Take those observations into a consultation and ask the injector to name which component each proposed step addresses. If the answer is vague, the plan probably is too.
