What it is
Glans corona filler (in the literature Glans Penis Augmentation, GPA) is a non-surgical male intimate medicine procedure performed as an outpatient. It involves targeted injection of hyaluronic acid along the coronal edge of the glans, with a twofold aim: to reduce tactile hypersensitivity of the mucosa and to slightly increase the circumference of the glans.
Treatment at a glance
| Parameter | Clinical detail |
|---|---|
| Main indication | Premature ejaculation due to glans hypersensitivity |
| Substance used | Cross-linked hyaluronic acid (resorbable) |
| Procedure duration | 20–30 minutes |
| Anaesthesia | Local (anaesthetic cream or nerve block) |
| Setting | Outpatient (no hospital stay) |
| Return to activities | Immediate (24 hours for sport) |
| Sexual abstinence | 7–14 days (as medically advised) |
| Reversibility | Complete (using the enzyme hyaluronidase) |
How it works
The treatment acts in two ways:
- Mechanical desensitisation. The hyaluronic acid injected into the corona creates a thin “cushion” between the surface and the underlying nerve endings, reducing the most intense tactile stimulation during intercourse. Sensitivity is not abolished.
- Slight increase in volume of the corona. The projection of the coronal edge increases moderately, without altering the natural shape of the glans. It is not a treatment to increase penile length.
I use cross-linked hyaluronic acids with high viscoelasticity, formulated to hold their shape in the tissues and to be gradually reabsorbed. For this reason the effect lasts over time but is not permanent.
Strengths
- No scalpel, under local anaesthesia
- Discomfort is generally minimal
- Immediate return to daily life
- Reversible with hyaluronidase
Limitations to be aware of
- Temporary effect: a top-up may be needed
- Not suitable if the cause is psychological, hormonal or urological
- Results vary from patient to patient
- The quality of the scientific evidence is still limited
Who it is suitable for (and who it is not)
Effectiveness depends above all on correct patient selection. The filler may be suitable for:
- Men with lifelong or acquired premature ejaculation linked to glans hypersensitivity: the ejaculatory reflex is triggered too early because of an excessive response to tactile stimuli.
- Patients who have not benefited from, do not tolerate or do not want ongoing therapies: topical anaesthetics, medication or behavioural techniques alone.
- Men who also want an aesthetic redefinition of the corona, with a more defined and harmonious profile.
An effect often reported by couples concerns their sexual rapport: the fuller corona increases stimulation during penetration and may help the partners to be better in sync.
The patient pathway: from consultation to result
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First consultation
Specialist assessment
- Discussion of the history of the problem and measurement or estimate of the baseline IELT
- Examination of the anatomy of the glans corona and sensitivity testing
- Ruling out causes for which the filler is not suitable
- Choice of the amount of product and a realistic discussion of expectations
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Day 0 · 20–30 minutes
Performing the treatment
- Local anaesthesia with cream or nerve block
- Targeted injections along the coronal edge and manual shaping
- Home straight afterwards, no hospital stay
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Days 1–14
Settling phase
- In the first days slight swelling or redness is normal and resolves on its own
- Sport after 24 hours
- Sexual intercourse suspended for 7–14 days, as medically advised
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After 30–60 days
Follow-up consultation and new IELT
- Check of the evenness and profile of the corona
- Comparison of the new IELT with the baseline
- A small refinement touch-up, if agreed
IELT: the parameter we use to measure the result
What is IELT and why do we measure it?
IELT (Intravaginal Ejaculatory Latency Time) is the time that elapses between the start of penetration and ejaculation. It is the parameter used by the scientific community, and by the International Society for Sexual Medicine (ISSM) in its official definition, to assess the severity of the condition and the effectiveness of treatments.
In published studies, glans corona filler increased the mean IELT by roughly 2–4 times compared with the baseline value, with wide differences between one patient and another.
Reference values
| Situation | IELT | Meaning |
|---|---|---|
| General population | Median about 5.4 minutes | Values vary greatly from man to man; they tend to fall with age (6.5 minutes between 18 and 30, 4.3 over 50) |
| Lifelong premature ejaculation | About 1 minute or less | Present from the first sexual experiences |
| Acquired premature ejaculation | Significant reduction, often to about 3 minutes or less | Appears after a period of intercourse with satisfactory times |
Time alone is not enough for a diagnosis. According to the ISSM definition, premature ejaculation is diagnosed only when a short latency is accompanied by poor control over the reflex and by personal or relationship distress. There is no “right time” that is the same for everyone: the goal is defined together during the consultation.
How it is measured before and after the filler
- Before the treatment. During the consultation we ask you to estimate or, better, to time your average IELT.
- After the treatment, at 30–60 days. At the follow-up consultation we compare the new IELT with the baseline value. It is an objective figure, which replaces the impression of “it lasts a short time” or “it lasts a long time”.
To measure it at home all you need is a stopwatch, started at the beginning of penetration and stopped at ejaculation. It is best to repeat the measurement over at least 3–5 occasions of intercourse and calculate the average.
What the scientific literature says
The technique was proposed in Korea in 2004. In the first study (139 patients, 65 of whom were treated with the filler alone) the IELT rose from about a minute and a half to about 4.7 minutes at six months, with 75% of patients and 62% of partners satisfied. Later studies reported similar results:
- An increase in IELT of 2.4 to 4.5 times compared with the baseline value in the studies collected in a 2020 review.
- Comparison with a placebo: in a randomised study of 30 patients, at one month the IELT increased by a median of 2.6 times with hyaluronic acid and 1.1 times with saline solution.
- Duration: in the only study with five years of follow-up (38 patients) the effect had partly diminished, but values were still higher than at the start; 76% of patients and 63% of partners were satisfied.
- Clinical practice: a survey of Korean urologists collected over 4,300 treatments, with pain or sensory changes in 0.5% of cases and recurrence in 4.7%.
Risks and side effects
- Transient local swelling and discolouration, usually resolved within 2 weeks to 1 month
- Bruising and mild pain at the injection site
- Temporary asymmetry, generally correctable
- Changes in sensitivity, rare
- Inflammatory or infectious reactions, rare and more frequent if the treatment is not performed by a professional experienced in this technique
Recovery
Recovery is generally quick: normal daily activities are resumed immediately, while for sport you wait 24 hours. It is advisable to abstain from sexual intercourse for 7–14 days; the exact period is defined by the doctor according to how healing progresses.
Frequently asked questions
Does glans corona filler hurt?
It is performed under local anaesthesia (anaesthetic cream or a nerve block), so discomfort during the injections is generally minimal. In the following days slight swelling or local soreness may appear, which resolve on their own.
How long does the effect last?
Hyaluronic acid is gradually reabsorbed, so the effect is not permanent and its duration varies from person to person. In the study with the longest follow-up (38 patients followed for 5 years) the effect had partly diminished over time, but values were still higher than at the start. Periodic top-ups are also described in the literature.
Is the treatment reversible?
Yes. The filler is reabsorbed on its own over time and, if necessary, it can be dissolved with a specific enzyme, hyaluronidase.
How soon can I resume sexual intercourse?
Generally after 7–14 days. The precise period is indicated by the doctor according to the amount of product injected and how the first few days go.
What are the main risks?
The studies mainly describe transient effects: swelling, bruising, mild pain or discolouration, which generally resolve within 2 weeks to 1 month. In the largest series (over 4,300 treatments in Korea) pain or sensory changes were reported in 0.5% of cases. However, the European guidelines (EAU) point out that serious complications can also occur and that further safety studies are needed.
Does it work for all forms of premature ejaculation?
No. The studies mainly concern premature ejaculation linked to glans hypersensitivity. If the problem has a mainly psychological or relationship component, or a hormonal or urological cause, the filler is not the first choice. The consultation exists precisely to understand which situation you are in.
How does the filler’s “cushion” mechanism work?
The hyaluronic acid injected into the corona creates a thickness of a few millimetres between the surface and the underlying nerve endings. In this way it reduces the most intense tactile stimuli during intercourse.
Does the filler abolish sensitivity of the glans?
No. The aim is to moderate hypersensitivity, not to anaesthetise the glans: sensitivity and pleasure remain. Changes in sensitivity are possible but rare, and are among the risks discussed during the consultation.
Can it be combined with other treatments?
Yes, when there is an indication. It can be considered together with girth enhancement of the shaft with hyaluronic acid or fat grafting (lipofilling), or with frenuloplasty if a short frenulum is also present. The choice is made during the consultation.
How can I measure my IELT at home?
In studies a stopwatch is used, started by one of the partners at the beginning of penetration and stopped at ejaculation. It is best to measure it over several occasions of intercourse, at least 3–5, and take the average. An estimate made by the patient is also considered a valid reference under the ISSM definition.
Does IELT also apply to anal or oral intercourse?
By definition IELT refers to vaginal penetration, and this is what the studies have been conducted on. The mechanism of the filler, namely the reduction of glans hypersensitivity, applies to any stimulation, but there are no specific data for other types of intercourse.
Scientific references
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Kim JJ, Kwak TI, Jeon BG, Cheon J, Moon DG – Effects of glans penis augmentation using hyaluronic acid gel for premature ejaculation
Source: International Journal of Impotence Research, 2004 – Nature
What it covers: the first clinical study of the technique. In 139 patients it compares dorsal neurectomy, filler alone (65 patients) and the two combined. With the filler alone the IELT rose from about a minute and a half to about 4.7 minutes at 6 months, with 75% of patients and 62% of partners satisfied.
Why it matters: it is the work from which the technique originates, and the baseline data on this page come from it.
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Kwak TI, Jin MH, Kim JJ, Moon DG – Long-term effects of glans penis augmentation using injectable hyaluronic acid gel for premature ejaculation
Source: International Journal of Impotence Research, 2008 – Nature
What it covers: follows 38 patients for 5 years. Volume and IELT decrease compared with the 6-month check, but remain above baseline values; at 5 years 76% of patients and 63% of partners are still satisfied, with no serious adverse reactions.
Why it matters: it is the only long-term duration data, useful for understanding that the effect diminishes but does not disappear suddenly.
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Abdallah H, Abdelnasser T, Hosny H et al. – Treatment of premature ejaculation by glans penis augmentation using hyaluronic acid gel: a pilot study
Source: Andrologia, 2012 – Wiley
What it covers: an Egyptian pilot study reporting an increase in IELT of about 3.6 times one month after treatment.
Why it matters: it confirms the Korean results in a different population, but in few patients and with short follow-up.
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Alahwany A, Ragab MW, Zaghloul A et al. – Hyaluronic acid injection in glans penis for treatment of premature ejaculation: a randomized controlled cross-over study
Source: International Journal of Impotence Research, 2019 – Nature
What it covers: a randomised study of 30 patients comparing the filler with an injection of saline solution. At one month the IELT increases by a median of 2.6 times with hyaluronic acid and 1.1 times with saline solution.
Why it matters: it is the comparison with a “placebo” control: it shows that the effect is not due solely to the patient’s expectation.
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Jeong HG, Ahn ST, Kim JW et al. – Practice Patterns Among Korean Urologists for Glans Penis Augmentation Using Hyaluronic Acid Filler in the Management of Premature Ejaculation
Source: Sexual Medicine, 2018 – Sexual Medicine
What it covers: a questionnaire sent to 56 Korean urologists, 36 of whom perform the treatment, for a total of 4,344 procedures. Pain or sensory changes in 0.5% of cases, recurrence of premature ejaculation in 4.7%.
Why it matters: it is the largest real-world case series available and gives an idea of how often complications occur in clinical practice.
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Kosseifi F, Chebbi A, Raad N et al. – Glans penis augmentation using hyaluronic acid for the treatment of premature ejaculation: a narrative review
Source: Translational Andrology and Urology, 2020 – TAU
What it covers: a review of the available studies: IELT increases by 2.4 to 4.5 times, with mild and transient side effects. The authors, however, emphasise small samples and non-validated assessment tools, and consider the treatment still experimental.
Why it matters: it summarises both the results and the limits of the evidence in a balanced way, and is the source of the “2 to 4 times” figure.
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Lim et al. – The techniques, efficacy and safety of penile glans augmentation using hyaluronic acid for the treatment of premature ejaculation: a systematic review and meta-analysis
Source: African Journal of Urology, 2024 – Springer
What it covers: a systematic review of 10 studies: IELT increases of 1.5 to 8.5 times, side effects between 0 and 30%, mild and resolved within a month. Only one study in ten has a low risk of bias.
Why it matters: it is the most recent synthesis: it confirms effectiveness but openly states that the quality of the evidence is still low.
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Waldinger MD, Quinn P, Dilleen M et al. – A multinational population survey of intravaginal ejaculation latency time
Source: The Journal of Sexual Medicine, 2005 – Oxford Academic
What it covers: 491 couples from five countries measure with a stopwatch the time between penetration and ejaculation. The median is 5.4 minutes, with values varying greatly from man to man and a decline with age.
Why it matters: it is the reference for the “normal values” of IELT cited on this page.
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Serefoglu EC, McMahon CG, Waldinger MD et al. – An Evidence-Based Unified Definition of Lifelong and Acquired Premature Ejaculation (ISSM)
Source: Sexual Medicine, 2014 – Sexual Medicine
What it covers: the official definition of the International Society for Sexual Medicine: lifelong premature ejaculation with an IELT of about 1 minute or less, acquired with a reduction to about 3 minutes or less, always together with poor control and personal distress.
Why it matters: it makes clear that time alone is not enough to speak of premature ejaculation.
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European Association of Urology – EAU Guidelines on Sexual and Reproductive Health: Disorders of Ejaculation
Source: Uroweb, current edition – Uroweb
What it covers: the European guidelines recognise that randomised studies show a modest but significant increase in IELT, and recommend using the filler “with caution” compared with more established treatments (weak recommendation), because further safety studies are needed.
Why it matters: it is the official position of European urologists, and anyone considering the treatment should know it.
Related male intimate medicine and surgery treatments:
Penile enhancement with filler and fat grafting (lipofilling) →
Medically reviewed by Dr Giulio Maria Maggi, Plastic Surgeon — last review:
Article written by
Dr Giulio Maria Maggi
Aesthetic Plastic Surgeon — Turin, Asti and Alessandria
Medical Director — Aesthetic Clinic (Turin)
Registered with the Turin Medical Council (Ordine dei Medici di Torino) no. 20595
Full Member of AICPE — Italian Association of Aesthetic Plastic Surgery (verify)
Expertise and areas of interest
Dr Maggi trained specifically in intimate medicine and surgery by working for 12 years alongside Prof. Renato Marten Perolino, urologist and plastic surgeon, at Villa Maria Pia Hospital and, privately, at Clinica Fornaca and Clinica Cellini in Turin. From him he learned male-to-female gender-affirming surgery, and he was first operator in breast augmentation procedures on Prof. Perolino's patients undergoing gender transition. He also trained internationally with Prof. José Guerrero Santos in Guadalajara and with Prof. Andrew A. Jacono in New York, in the Deep Plane facelift technique.
His particular areas of focus are:
- Functional and aesthetic intimate surgery, male and female
- Deep Plane facelift
- Blepharoplasty
- Liposculpture and fat grafting (lipofilling)
- Breast surgery
- Body contouring
Clinical approach: «Prima comprendere» ("Understand first"). No promises of results: indications, risks and limits explained frankly, so that every patient can make a truly informed choice.
