How long do PDO threads last? And when do they work
A PDO (polydioxanone) thread is absorbed by the body over a few months, and the effect can last a bit longer. In practice, duration usually falls between a few months and about a year, depending on the type of thread, the area, skin quality and the patient. It is not permanent, and anyone promising "years" of lift with an absorbable thread is promising too much.
As for when the effect starts, there are two answers, one for each type of thread. This page separates the two and lays out the timeline so you can explain it to the patient.
Why does duration depend on the type of thread?
PDO threads fall, broadly, into two groups with different goals:
| Aspect | Smooth or spiral thread | Barbed (cog) thread |
|---|---|---|
| Main goal | Collagen stimulation, skin quality | Subtle repositioning of tissues |
| When the effect appears | Gradual, over weeks to months | Partly right away; real look after the swelling |
| What sustains the effect | Collagen formed around the thread | Anchoring of the barbs, then collagen |
| Usual duration of effect | A few months, tied to the collagen formed | From a few months to about a year |
| How the effect fades | Gradually, with natural aging | Gradually, as the thread is absorbed |
The ranges are general references and vary with the thread, technique and patient. Barbed threads are the thread lifts proper.
Do PDO threads have an immediate effect?
Partly. With barbed threads, repositioning is usually noticeable right after the procedure, but that first look is misleading: there is swelling, a pulling sensation and sometimes small irregularities that change how the face reads in the first days. The look that counts for assessment appears after that passes.
With smooth threads, there is no relevant immediate effect. What they do, stimulating collagen around the thread, develops over weeks to months, similar to the logic of a collagen biostimulator.
PDO thread timeline
| Period | What usually happens |
|---|---|
| Right after | Visible repositioning (barbed threads); entry points, discomfort |
| First days | Swelling, pulling sensation, possible bruising, small irregularities |
| 1 to 2 weeks | Swelling goes down; the look approaches the real one |
| Around 2 weeks | Follow-up to assess symmetry and the initial result |
| 1 to 3 months | Collagen stimulation underway |
| A few months | The thread is gradually absorbed; the effect begins to fade slowly |
| Up to about a year | Residual effect, depending on the type of thread and the patient |
Timeframes vary. Aftercare for the first days, with warning signs, is in post-PDO thread instructions.
What makes the effect last longer or shorter?
- Degree of laxity: the more pronounced it is, the smaller and shorter the repositioning effect tends to be.
- Skin quality and thickness: very thin or very heavy skin tends to respond worse.
- Movement of the area: highly mobile areas tend to lose the effect sooner.
- Type and number of threads: the professional's choice, based on assessment.
- Habits and aging: unprotected sun, smoking and significant weight loss have an influence.
- Combined plan: threads combined with filler for support or with a biostimulator are usually designed to add up their effects.
If threads work, why do they need to be redone?
Because the thread is absorbed and the face keeps aging. Redoing them, or maintaining with other options, is a decision made at reassessment, not on a fixed calendar. The realistic expectation of what threads deliver is in do PDO threads work?, and the comparison with the biostimulator is in biostimulator or PDO threads.
How does the duration compare with other procedures?
PDO threads fall in a range similar to several fillers and below some biostimulators, always with a lot of variation. The general table is in how long does facial harmonization last?.
Where does Harmy fit in?
Harmy does not simulate threads. For patients who combine threads with filler, the projection can show the filler part of the plan at the marked points, such as Jawline, with the ml defined in Plan, and "Add actual result" lets you compare the before photo with the follow-up one, aligned by the eyes.
Frequently asked questions
How long do PDO threads last in the face?
A PDO thread is usually absorbed by the body over a few months. The effect can last a bit longer, generally from a few months to about a year, depending on the type of thread, the area and the patient.
Do PDO threads have an immediate effect?
Barbed threads can give a repositioning that is noticeable right away, but the real look only appears after the swelling and pulling sensation of the first days pass. Smooth threads work through collagen stimulation, which is gradual.
How long do PDO threads take to work?
The initial look is usually assessed after one to two weeks, once the swelling goes down. Collagen stimulation develops over weeks to months.
When should PDO threads be redone?
When the effect fades, at the professional's discretion and after reassessment. There is no single interval: it depends on the type of thread, the patient's response and the agreed plan.
Harmy images are illustrative simulations generated by AI from the patient's photo to support the conversation between practitioner and patient. They are not a promise of results. Indication, technique, product and volume are solely the decision of the licensed practitioner. This content is for information only and does not replace a clinical assessment.