PDO threads in the upper lip and perioral area: limits
- Muscle
- Highlighted area
Quick facts
- Concern that motivates it
- Fine vertical lines of the upper lip ('lip lines') and loss of perioral skin quality.
- Described use
- Smooth PDO threads to stimulate collagen in fine lines, with limited evidence and reports of variable results.
- Why the area is difficult
- A very mobile muscle, thin skin, nearby mucosa with oral flora, labial arteries, and high visibility of any irregularity.
- Prudent stance
- Restricted indication, low expectations, and frequent preference for alternatives with a better risk and predictability profile.
The upper lip is one of the areas that most betray the passage of time: fine vertical lines appear, the so-called lip lines, the border of the vermilion loses definition, and the perioral skin gets thinner. It is natural for the patient to ask whether PDO threads, which they heard about as "collagen stimulators", work for this area. The short answer is: there is a described use, but it is restricted, with limited evidence and a higher risk than in many other areas.
This guide is a review. It explains what is discussed about threads in the upper lip and perioral area, why the area is unfavorable, and which alternatives exist. It does not cover insertion technique, planes, points, or protocol, which are decisions for the licensed professional, according to the rules of their professional council in Brazil. For thread types, see smooth threads for biostimulation and types of PDO threads.
What is behind upper lip lines?
Vertical upper lip lines have a combination of causes. The orbicularis oris muscle forms a sphincter that contracts when speaking, drinking through a straw, whistling, and smoking, and repeating that movement marks the skin. Loss of elasticity and collagen, accumulated sun exposure, volume loss in the lips, and bone and dental resorption contribute to deepening. In many cases, smoking and habits tied to perioral movement aggravate the picture.
This matters because treatment depends on the dominant component. A dynamic line calls for acting on movement; a static line calls for stimulation or filler; loss of support calls for volume or a dental procedure. The thread acts on only part of this scenario, and often not on the main component. See the review of the topic in botulinum toxin: vertical lip lines and hyaluronic acid for lip lines.
How are smooth threads used in this area?
In the literature and in practice, the use of thin, smooth PDO threads in superficial paths is described to stimulate the skin along the lines. The idea is to use the tissue response to the material to induce collagen formation and improve texture. There is no significant traction or volume effect. As in other areas, the results described are generally modest and variable, and the studies are small with short follow-up. In terms of levels of evidence in HOF, it is a low-evidence use.
| Strategy | What it does for lip lines | Note |
|---|---|---|
| Smooth PDO thread | Superficial tissue stimulation | Limited evidence; risk of a visible thread |
| Botulinum toxin | Reduces orbicularis contraction | Treats the dynamic component; risk of affecting lip function |
| Hyaluronic acid | Fills the line and gives support | Vascular risk area; careful technique |
| Biostimulator | Improves tissue quality | Choice and technique specific to the area |
| Skin technologies | Collagen stimulation and texture | Depend on the device and phototype |
| Habits and sun protection | Reduces aggravating factors | Basis of any plan |
Why is the area unfavorable for threads?
Four characteristics weigh against it. The first is mobility: the lip moves with every word and every smile, and any foreign body undergoes constant traction. The second is thickness: the skin is thin, with little subcutaneous tissue, which makes a visible or palpable thread more likely. The third is the proximity to the oral mucosa, which harbors bacterial flora: an extrusion or a path that reaches the mucosa raises the risk of infection. The fourth is vascularization: the superior labial arteries and their anastomoses run through the area, and there is a risk of vascular injury, as in any lip procedure. See superior labial artery and labial vascular occlusion.
What are the most relevant risks?
Besides the general thread events (pain, swelling, bruising, dimples, asymmetry, infection), the perioral area adds:
- Palpable or visible thread along the lines, mainly in thin skin;
- Nodules and irregularity from the inflammatory response in thin tissue;
- Movement changes, such as tightness or asymmetry when smiling and speaking;
- Infection from proximity to the mucosa and the oral flora;
- Bruising in a highly vascularized area, with immediate aesthetic impact.
Management for each situation is in complications with PDO threads, thread extrusion and visibility, and indications for thread removal.
When can the indication still be considered?
When it exists, the indication is usually restricted to patients with fine lines, skin of reasonable thickness, no active infection or cold sore, low expectations, and who accept the possibility of a palpable thread and removal. In all others, alternatives usually offer a better balance of benefit and risk. For choosing by area, the patient-facing text is in PDO threads: areas of the face.
What should you tell the patient?
The patient wants a solution for lip lines, and the honest answer is that no single resource solves everything. The approach is usually combined and gradual, and the thread is a possible piece, not the main one. Avoid promising to "erase" the lines.
Where does Harmy come in?
Harmy does not simulate threads or treat expression lines. For the lips, the app has the Lips point, with an illustrative volume projection in ml, which can help with talking about proportion and contour. That is different from the thread's goal in vertical lines, and it is worth making clear to the patient that the simulation shows volume, not the smoothing of fine lines. The projection uses the frontal photo and is illustrative.
Summary
In the upper lip and perioral area, the smooth PDO thread has a restricted use, limited evidence, and a risk increased by mobility, thin skin, and the mucosa. Identify the cause of the lines, prefer alternatives when they offer better safety, explain the risks, and keep follow-up close.
Frequently asked questions
Do PDO threads treat lip lines?
Smooth threads are described for stimulating the skin in fine upper lip lines, but the evidence is limited and the result is variable. Deep lines generally call for combining other resources, and the dynamic cause may require toxin.
What are the risks of a thread in the upper lip?
Palpable or visible thread, nodules, irregularity, asymmetry when smiling, and a risk of infection from the proximity to the oral mucosa. The area is very mobile, and any irregularity shows.
Do PDO threads enlarge the lip?
That is neither the goal nor the expected effect. The smooth thread does not restore volume the way filler does. To change lip volume or contour, other approaches are considered.
Does a thread in the lip interfere with speech and smiling?
The upper lip moves a lot when speaking and smiling, and a poorly tolerated thread can cause discomfort, tightness, or asymmetry during movement. That is why the indication is restricted and follow-up is close.
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.