If you’re considering non-surgical skin tightening, you may have heard the term SMAS — short for the superficial musculoaponeurotic system. It’s a key layer beneath the skin that surgeons traditionally target during facelifts. But what if you could stimulate this same layer without a scalpel? That’s precisely how HIFU lifts the SMAS layer — using focused ultrasound energy to firm, lift, and contour the face naturally.
What Is the SMAS Layer?
The SMAS sits beneath the fat and dermis, just above the muscle. It plays a vital role in facial structure and sagging. When this layer weakens over time — due to ageing, gravity or fat loss — the skin can appear droopy or less defined, especially around the jawline and cheeks.
This is the same layer tightened during surgical facelifts. However, HIFU (High-Intensity Focused Ultrasound) is the only non-invasive treatment that can safely reach the SMAS without breaking the skin.
How Does HIFU Work?
HIFU delivers precise ultrasound energy deep beneath the skin’s surface, bypassing the upper layers entirely. The energy creates controlled points of thermal injury in the SMAS layer, which stimulates a healing response. This leads to new collagen formation and gradual lifting of the tissue.
Unlike lasers or radiofrequency, which target shallower layers, HIFU can reach depths of 3.0 mm and 4.5 mm, making it uniquely capable of treating foundational skin laxity.
Who Is It For?
HIFU is most effective for individuals with mild to moderate sagging, particularly in the lower face, neck, and jawline. It’s also useful for lifting the brows, tightening the area under the chin, and smoothing out fine lines on the décolletage.
Many clients visiting our Canon Street location are seeking discreet yet effective solutions that require no downtime. HIFU fits seamlessly into this lifestyle, with most treatments completed in under 90 minutes.
When Will You See Results?
Some clients experience a subtle lift immediately after treatment. However, the real transformation takes place gradually over two to three months, as collagen builds and tightens the deeper structures. Results can last up to 12–18 months, with occasional top-up sessions recommended.
What Does It Feel Like?
Clients often describe the sensation as a series of warm tingles or mild pinpricks, particularly when the ultrasound reaches deeper layers. Discomfort is usually minimal, and no anaesthetic is needed. After treatment, there may be slight redness or sensitivity, but these effects typically resolve within hours.
Is It Safe?
HIFU is a CE-marked, clinically studied treatment with an excellent safety profile. It’s suitable for all skin tones and does not involve needles or skin disruption, reducing the risk of complications.