The basic approach to choosing where to have facial sclerotherapy is to select a clinic that explains the type and concentration of medication used, as well as what to expect if post-inflammatory hyperpigmentation occurs[1]Research indicates that hyperpigmentation after sclerotherapy tends to increase with higher medication concentration[1]Because facial blood vessels connect with blood vessels around the eyes, expertise in facial vascular anatomy is also a key differentiator[2].
Is there an explanation of medication type and concentration?
What you should ask about is which medication will be used and at what concentration. In a review of research primarily examining fine blood vessels in the legs, polidocanol at 0.25% showed post-inflammatory hyperpigmentation in 2–25% of cases, at 0.5% in 12.5–67.9%, and at 1% in 13–73%[1].
Although the numbers vary considerably between studies, a trend toward increased hyperpigmentation at higher concentrations is evident[1]It is important to note that these figures are not from facial studies.
Polidocanol has relatively mild vessel-damaging properties, and skin complications such as ulceration are less common; however, research reports that treatment sessions may need to be repeated[3]This comes from research on blood vessel disease in children.
What happens if post-inflammatory hyperpigmentation occurs?
In most cases, post-inflammatory hyperpigmentation fades over time. Reports indicate it typically resolves within 6–12 months, with 1–2% of cases showing persistent hyperpigmentation[4].
There are also reports of residual hyperpigmentation being treated with a combination of multiple laser types[5]Before treatment, ask how the clinic will monitor progression if hyperpigmentation develops and what interventions are available.
Is the clinic knowledgeable about facial vascular anatomy?
Knowledge of vascular anatomy is essential for facial injection procedures, because facial blood vessels connect with blood vessels around the eyes and inside the head[2].
This point is emphasized in research examining hyaluronic acid and other fillers, not in studies specifically of sclerotherapy itself[2]Nevertheless, if treating blood vessels near the eyes, it is worthwhile to confirm how far the injection will extend. It is also recommended to monitor the injection site shortly after treatment to verify there are no adverse changes[2].
What is the dosage, and what are rare serious reactions?
Common reactions include pain, redness, swelling, and bruising, with ulceration also noted[6].
Although rare, serious reactions have been reported, including chest pain, cough, and vision disturbances; these are often associated with dosage calculation errors[7]Ask how the clinic determines the dose for each treatment.
How much is known from facial research?
There are reports of polidocanol being effective on facial blood vessels. However, most are case reports or small studies, with limited strength of evidence[6].
The post-inflammatory hyperpigmentation figures cited here come primarily from research on leg blood vessels[1]It is important to note that the same outcomes cannot be assumed for facial treatment; confirm that the clinic explains this.
Where to have it done? Guide for when you are unsure
During your consultation, ask about the following points:
Medication: Will the clinic explain which medication and what concentration will be used?[1]
Post-inflammatory hyperpigmentation: Will the clinic discuss expected progression if it occurs and what treatment options are available?[4][5]
Vascular anatomy: Does the clinic pay attention to blood vessels around the eyes?[2]
Dosage: Will the clinic explain how the treatment dose is determined?[7]
Research limitations: Will the clinic mention that facial research is limited?[6]
Whether your blood vessels are suitable for sclerotherapy or whether another method such as laser would be better cannot be decided from an article alone. During your examination, have the clinic assess your vessel thickness, location, and tendency toward hyperpigmentation, then decide together on the medication and number of sessions.
- 1Bossart S, Daneluzzi C, Cazzaniga S, Ramelet AA, Uthoff H, Seyed Jafari SM, et al. Skin hyperpigmentation after sclerotherapy with polidocanol: A systematic review. Journal of the European Academy of Dermatology and Venereology. 2022. doi:10.1111/jdv.18639
- 2Oranges CM, Brucato D, Schaefer DJ, Kalbermatten DF, Harder Y. Complications of Nonpermanent Facial Fillers: A Systematic Review. Plastic and Reconstructive Surgery Global Open. 2021. doi:10.1097/GOX.0000000000003851
- 3Hou F, Chen J, Xia M, Ding K, Zeng Q, Liu W. Percutaneous sclerotherapy with polidocanol under the guidance of ultrasound for venous malformations in children: A retrospective cohort study from a single tertiary medical center. Medicine. 2020. doi:10.1097/MD.0000000000018839
- 4Skandali A, Mulita F, Stathopoulou M, Tsimpoukis A, Nikolakopoulos K, Panopoulou E, et al. Superficial venous aneurysms: a case-based review. Archives of Medical Sciences. Atherosclerotic Diseases. 2025. doi:10.5114/amsad/209875
- 5Alekseev N, Mishanina V. Combined Laser Therapy for Post-sclerotherapy Hyperpigmentation Following Nicolau Syndrome: A Case Report. Cureus. 2025. doi:10.7759/cureus.82375
- 6Nguyen QD, Stender C, Bur D, Silapunt S. Polidocanol: A Review of Off-Label Dermatologic Uses. Dermatologic Surgery. 2022. doi:10.1097/DSS.0000000000003520
- 7Bertanha M, Sobreira ML, Pinheiro Lúcio Filho CE, Mariúba JVO, Pimenta REF, Jaldin RG, et al. Polidocanol versus hypertonic glucose for sclerotherapy treatment of reticular veins of the lower limbs: study protocol for a randomized controlled trial. Trials. 2014. doi:10.1186/1745-6215-15-497