PDO threads in the brow: indication and limits
PDO threads in the brow are absorbable polydioxanone threads inserted in the lateral forehead and temple to give the brow a discreet lift, especially at the tail. The technique became known for the appeal of the "lifted look", but the reach is small and temporary, and the ideal candidate is very specific.
This page covers indication, limits, comparison with other approaches, and risks. It does not teach technique: thread type, vectors, planes, and quantity are decisions for the licensed professional, according to the rules of their professional council in Brazil and the instructions for use of the product registered with ANVISA (the Brazilian health regulator). For the overview of threads, see types of PDO threads.
What does the thread do in the brow?
PDO threads divide, simply, into two groups:
- Smooth or biostimulation threads, without barbs, which cause a local tissue response and may improve skin quality, without relevant traction.
- Barbed threads, with barbs, which anchor in the tissues and allow a discreet repositioning. They are the ones used when the goal is to lift, within the logic of thread lifts.
In the brow, the lift comes from mechanical support of the lateral soft tissues, plus some collagen response around the thread. The thread is absorbed in a few months, and the mechanical part of the effect tends to fade before that.
Who is a good candidate?
| Profile | Does the thread tend to help? | Note |
|---|---|---|
| Mild tail drooping, good skin quality | Yes, with a discreet effect | Best scenario described |
| Mild asymmetry between the brows | Sometimes | Assess the muscular cause first |
| Moderate to marked brow drooping | Little | Surgical assessment |
| Excess skin in the upper eyelid (dermatochalasis) | No | The thread does not remove skin |
| Eyelid ptosis | No | It is the eyelid that droops, not the brow; refer |
| Very thin or lax temple skin | Limited | Higher risk of an apparent thread and dimple |
| Marked temporal hollowing | Limited | Supporting volume may matter more than traction |
The "tired look" has several causes, and the brow is only one of them. Before choosing threads, make the full diagnosis, as in tired look: assessment.
Threads, toxin, filler, or surgery?
| Approach | How it acts | Usual reach | Usual duration |
|---|---|---|---|
| Botulinum toxin | Relaxes the brow depressors | A few millimeters, especially at the tail | A few months |
| Barbed PDO thread | Mechanical support of the lateral tissues | Discreet | Temporary, variable |
| Supporting filler | Restores volume in the lateral brow and temples | Improves support, does not "pull" | Varies with the product |
| Brow or eyelid surgery | Repositions structures and removes excess | Greater and more predictable | Long |
The approaches are not mutually exclusive. Many plans combine toxin to balance the musculature and supporting volume in the temples and the lateral brow area, which includes the ROOF, and the thread comes in as a complement in selected cases. For the muscle logic, see the muscle map for botulinum toxin.
Which structures call for attention?
The lateral forehead and temple concentrate structures that explain a good part of the complications:
- Temporal branch of the facial nerve, which crosses the area toward the frontalis muscle. Injury can affect brow elevation on the affected side.
- Superficial temporal artery and its frontal branch, plus veins of the temporal region.
- Supraorbital bundles, with the supraorbital artery and the sensory nerves of the forehead, more medial.
- Fascias and the temporal fossa, which define the planes of the area.
Which complications are most common?
- Swelling and bruising in the first days.
- Pain when moving the forehead or chewing, when the path runs close to the temporal region.
- Dimples and ripples, which usually improve in the first weeks.
- Asymmetry of lift between the sides.
- Palpable, visible, or extruding thread, more likely in thin skin.
- Infection and biofilm.
- Fast loss of the effect, disappointing the patient's expectation.
Recovery time and what to tell the patient are in PDO threads: recovery. To hand over in writing, use the post-PDO-thread instructions template.
How long does it last and when does it make sense to repeat?
Reported durability for PDO threads is variable and depends on the type of thread, skin thickness and quality, the strength of the muscles in the area, and the patient's habits. In the brow, which moves all day with expression, the traction effect tends to be shorter than in less mobile areas. The collagen response around the thread may maintain a discreet skin quality improvement for longer, but without the initial lift. See PDO threads: how long do they last.
Before repeating, reassess: if the drooping progressed, if excess eyelid skin appeared, or if the patient is seeking an effect the thread does not deliver, the answer may be a different approach, not more threads. Repeating many times in thin skin also increases the chance of irregularity.
And regulation?
The popular name "brow lift" gets confused with a surgical procedure. In dentistry, CFO Resolution 230/2020 (from the Brazilian Federal Council of Dentistry) lists "castanhares surgery or brow lifting" among the surgeries prohibited to dentists, with the exceptions added in 2026. Whether a thread procedure falls within that prohibition is a matter of interpreting the rules: check with your council before indicating and advertising it. The history of these rules is in orofacial harmonization at the CFO.
In advertising, avoid calling the procedure a "lift" and never promise a lift defined in millimeters.
How do you explain it to the patient?
Record the expected reach, the variable duration, and the risks in the informed consent, as in the informed consent template for PDO threads. Keep the photos with a relaxed forehead and the thread lot in the patient record.
How do you assess the before and after?
Photos of brow threads are especially misleading. Swelling in the first days lifts the area, expression changes brow height, and a slight head tilt creates a "lifted look" effect. Compare only standardized photos, with the same lighting, a relaxed forehead, eyes looking forward, and after the swelling has gone down. See standardized clinical photography.
And in Harmy?
Checklist before choosing threads for the brow
- Cause of the droopy look defined: brow, eyelid, volume, or skin.
- Assessment with a relaxed forehead and closed eyes recorded.
- Dermatochalasis and eyelid ptosis ruled out or referred.
- Skin quality and thickness assessed.
- Alternatives presented: toxin, supporting volume, surgery.
- Your council's rules checked for the procedure and advertising.
- Consent with discreet reach and variable duration.
- Standardized photos and follow-up scheduled.
Frequently asked questions
Do PDO threads lift the brow?
Barbed threads can give a discreet lift, especially of the brow tail, in patients with mild drooping and good skin quality. They do not replace surgery for marked drooping or correct excess eyelid skin.
How long do PDO threads last in the brow?
The polydioxanone thread is absorbed by the body within a few months, and the lifting effect is usually temporary, varying with the type of thread, the skin, and movement in the area. Reported durability is variable and should be presented to the patient without promises.
Threads in the brow or botulinum toxin: which to choose?
Toxin lifts the brow by relaxing the muscles that pull it down, with an effect of a few millimeters. The thread acts through mechanical support of the tissues. Both have a small reach, can be combined, and the choice depends on the muscle and skin assessment.
Are before and after photos of PDO threads in the brow reliable?
Before and after photos of threads are often taken with recent swelling and different angles and expressions, which exaggerates the effect. Always compare standardized photos, with the same lighting, a relaxed forehead, and the same head position, and after the swelling has gone down.
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.