
Sylfirm X is known for a pulsed-wave mode used in melasma and redness. Dr Sin Yong explains how it works, what the evidence shows, and how these concerns are treated at IN Eternity Clinic on Orchard Road.
WhatsApp to Enquire →Key facts ↓Sylfirm X is a bipolar RF microneedling platform with two modes. Its continuous-wave mode works like standard RF microneedling on collagen. Its pulsed-wave mode delivers very short RF pulses aimed at abnormal small vessels and the damaged basement membrane seen in melasma and redness. IN Eternity Clinic does not offer Sylfirm X; it treats these concerns by other methods.
Sylfirm X is an RF microneedling platform developed in Korea. Like other RF microneedling devices, it inserts fine needles into the skin and passes radiofrequency current between them to heat the tissue. What sets it apart is that it offers two ways of delivering that current.
In continuous-wave mode, current flows for a sustained period at each insertion, creating zones of thermal coagulation that remodel collagen. This is how most RF microneedling works, and it is used for acne scars, pores and texture. In pulsed-wave mode, the energy is delivered as a train of very short pulses. The intention is to heat small targets, particularly fine abnormal blood vessels in the upper dermis, while limiting the spread of heat to surrounding tissue. This is why the platform has become associated with melasma, persistent redness and sensitive, reactive skin, conditions in which conventional heat-based treatments can make things worse.
For pigment and redness work, needles are usually set shallow, at the level of the upper dermis where the abnormal vessels and the basement membrane lie. Sessions are done under numbing cream and take less time than a full-face scar treatment. A course of several sessions a few weeks apart is typical, and many people continue with occasional maintenance because the underlying tendency remains.

Melasma used to be thought of only as excess pigment in the epidermis. Research over the past two decades has shown a more complicated picture. Melasma skin often has more and larger small blood vessels, signs of chronic sun damage in the dermis, and a damaged basement membrane, the thin sheet that separates the epidermis from the dermis. Signals from the dermis and vessels appear to keep pigment cells overactive, and where the basement membrane is damaged, pigment can drop into the dermis where it is harder to clear.
Pulsed-wave RF microneedling is designed around this model. By coagulating abnormal vessels and prompting repair of the basement membrane, it aims to address factors beneath the visible pigment rather than breaking up pigment directly. A 2022 study of 44 patients with facial melasma or Riehl melanosis treated with five sessions of pulsed-type RF microneedling reported clinical improvement in most patients, lower erythema and melanin indices, and on biopsy fewer melanin deposits and blood vessels with a thickened basement membrane. That is encouraging but limited: it was not controlled against another treatment and follow-up was short.
“Melasma is managed, not erased. I would rather keep it calm for years than chase one dramatic session that provokes a rebound.”
| Sylfirm X pulsed wave | Standard RF microneedling | |
|---|---|---|
| Main target | Small vessels, basement membrane | Dermal collagen |
| Heat pattern | Very short pulses, limited spread | Sustained coagulation zones |
| Typical uses | Melasma, redness, reactive skin | Acne scars, pores, texture, laxity |
| Usual depth | Shallow | Shallow to deep, by target |
The platform’s continuous-wave mode sits in the right-hand column, so Sylfirm X can be used for both kinds of work. Other RF microneedling platforms, including Secret Duo, are generally used for collagen remodelling rather than vessel-targeted pulsing.

Melasma is a chronic condition. It is driven by sun and visible light, hormones, heat and genetic tendency, and none of those disappears after a course of any device. Most experts treat it as something to control over years rather than cure. Procedures, including pulsed RF, work as one part of a plan that also includes daily broad-spectrum sun protection with visible-light cover, prescription or cosmeceutical skincare, and in suitable people oral tranexamic acid, a prescription medicine with its own contraindications.
Relapse after any procedure is common, especially after summer, pregnancy or a change in contraception. Heat-based procedures can also provoke rebound pigment if settings are too strong. A sensible goal is a lighter, more even, more stable complexion with fewer flares, not complete clearance.
It is generally considered for people with established melasma that has not settled with sun protection and skincare alone, for persistent redness with visible fine vessels, and for sensitive skin that reacts badly to stronger heat-based treatments. It is less relevant for sun spots and freckles, which are epidermal and usually respond readily to pigment lasers, and for deep acne scars, which need a broader scar plan.
As with any microneedling, it is postponed where there is active infection, cold sores or eczema in the area, and needs discussion in pregnancy, with bleeding disorders, a tendency to keloid scarring, or recent oral isotretinoin, a prescription medicine. Melasma that is actively flaring, for example after a recent holiday, is often calmed with skincare first.
Whatever device is offered, a few questions help. Has the pigment been typed, or is everything being called melasma? What is the plan for sun and visible-light protection, and for skincare between sessions? How will rebound pigment be recognised and handled if it happens? What happens after the course: is there a maintenance plan, and what are the signs that it should be paused? Honest answers to these matter more than the name of the platform, because melasma outcomes depend on the whole plan over time.
IN Eternity Clinic does not offer Sylfirm X. The first step at the clinic is to work out what the pigment actually is, because sun spots, freckles, post-inflammatory marks, Hori’s naevus and melasma often sit side by side and need different handling. Redness is similarly sorted into rosacea, sensitised skin, broken capillaries and lingering post-acne marks.
For melasma, Dr Sin Yong uses gentle, low-fluence picosecond toning on the DEKA TORO or Fotona StarWalker PQX within the clinic’s pigment protocols, medical treatment and skincare, and strict sun protection; see melasma treatment. For redness and the vascular side of skin, the clinic’s 少女光 protocol uses the DEKA RedTouch Pro 675 nm laser, which acts on collagen and the vascular part of the dermis. For texture and pores alongside pigment, RF microneedling on Secret Duo may be used with conservative settings.
Which combination makes sense depends on your skin type, how active the melasma is and what has been tried before. Dr Sin Yong will tell you which option he recommends and why.
Whatever procedure is chosen, the daily routine carries much of the weight. That usually means a broad-spectrum sunscreen that also covers visible light, which in practice means tinted formulas containing iron oxides, reapplied through the day; skincare that calms pigment production without irritating the skin; avoiding scrubs and harsh peels at home; and limiting heat exposure. Plans are reviewed after the hotter months and after any hormonal change, because these are the times melasma tends to return.
With pulsed RF microneedling, as with gentle RF microneedling generally, recovery is short. Day 0: redness and mild swelling, sometimes pinpoint marks. Days 1 to 3: redness fades and the skin may feel dry. Week 1: most people look normal. Courses are typically several sessions a few weeks apart. Throughout, sun protection and avoiding heat, such as saunas and hot yoga, help reduce the risk of pigment flaring.
No. For melasma and redness the clinic uses pigment and redness typing first, then options such as gentle picosecond toning, the DEKA RedTouch Pro 675 nm laser, RF microneedling on Secret Duo with conservative settings, and medical treatment. Dr Sin Yong will explain which he recommends for your skin.
Continuous-wave RF heats tissue for a sustained period, creating coagulation zones that remodel collagen. Pulsed-wave RF delivers energy as very short bursts, intended to heat small targets such as fine abnormal vessels with less spread of heat into the surrounding skin.
Small studies, mainly from Korea, report improvement in melasma and redness measures after a course of pulsed-type RF microneedling. The evidence is promising but limited in size and follow-up. Melasma also needs sun protection, skincare and sometimes oral treatment, whatever procedure is used.
Melasma can usually be lightened and kept more stable, but it is a chronic condition that tends to return with sun exposure, heat and hormonal change. A realistic aim is a calmer, more even complexion with fewer flares, maintained over time.
It can if too much heat is used or aftercare is poor, because heat and inflammation can stimulate pigment cells. In melasma-prone skin, settings are kept conservative, sun protection is strict, and sessions are spaced to let the skin settle.
It depends entirely on the cause. Rosacea, a sensitised barrier, broken capillaries and post-acne redness each respond to different approaches, including skincare, trigger control, medical treatment and vascular-targeted lasers. The cause is identified at assessment before any device is chosen.
Cost depends on the type and extent of pigment, which procedures are combined, how many sessions are needed and the skincare or medication involved. At IN Eternity Clinic, Dr Sin Yong explains the plan and gives a written quote after assessment.
IN Eternity Clinic, 9 Scotts Road, #12-01 Pacific Plaza, Singapore 228210. By appointment with Medical Director Dr Sin Yong. Monday to Saturday, 11am to 8pm. WhatsApp or call +65 8815 3008.
These sources describe mechanisms and general evidence. They are not a promise of any individual result; suitability is decided at an in-person assessment.