Best Treatments for Sagging Jowls: Ultherapy vs Thread Lift

Jowls are one of the first signs of ageing that people notice in the mirror. As the supporting tissues of the lower face loosen and fat pads descend, the once-straight line of the jaw develops a soft bulge on either side of the chin. In Korea, two of the most frequently discussed non-surgical answers are Ultherapy, a focused ultrasound lifting device, and thread lifting, in which absorbable threads are placed under the skin to reposition tissue.

Both aim to restore a cleaner jawline, but they work in very different ways and suit different people. This guide explains how each one works, how they compare, and how to decide which is more appropriate for your face and your travel plans.

Why jowls form

Jowling is rarely caused by skin alone. Several changes usually happen together: the skin loses collagen and elasticity, the SMAS (the fibromuscular layer beneath the fat) becomes lax, the ligaments that anchor soft tissue to bone weaken, and facial fat redistributes downward. Bone resorption along the jaw can also make the area look less defined. Understanding which of these factors is dominant helps explain why one treatment may work well for one person and disappoint another.

How Ultherapy works

Ultherapy is a microfocused ultrasound device with real-time imaging. The practitioner can see the tissue layers on screen and deliver energy at set depths, commonly targeting the SMAS and the deep dermis. Each pulse creates tiny thermal coagulation points, and the body responds over the following weeks by remodelling and producing new collagen.

• Onset: some people notice slight tightening early, but the main change typically develops over two to three months.
• Downtime: usually minimal. Mild redness, swelling or tenderness along the jaw can last a few days.
• Comfort: treatment can be uncomfortable over bony areas; clinics often use numbing cream or oral pain relief.
• Maintenance: many patients repeat treatment roughly once a year, though this varies with age and skin quality.

In Korea, Ultherapy sits alongside many other HIFU devices such as Shurink and Ulfit-type machines. Ultherapy is often chosen by patients who value the imaging feature, though the skill and planning of the practitioner matters as much as the device.

How thread lifts work

A thread lift uses absorbable sutures, most commonly made of PDO (polydioxanone), PCL or PLLA, inserted under the skin through fine needles or cannulas. Barbed or cogged threads grip the tissue and are pulled to lift and reposition sagging areas along the jaw and cheek. As the threads gradually dissolve, they also trigger a mild collagen response around their path.

• Onset: the lift is visible immediately, although initial swelling can mask or exaggerate the result for a week or two.
• Downtime: swelling, bruising, tightness and small dimples or puckering are common for several days to two weeks.
• Restrictions: patients are usually told to avoid wide mouth opening, chewing hard foods, facial massage and strenuous exercise for a period after treatment.
• Longevity: results are often described as lasting around a year or so, depending on thread type, number of threads and individual tissue.

Ultherapy vs thread lift: key differences

• Mechanism: Ultherapy tightens through heat-induced collagen remodelling; threads physically reposition tissue and add modest collagen stimulation.
• Best for: Ultherapy suits mild to early moderate laxity and prevention; threads suit moderate jowling where a visible mechanical lift is wanted.
• Speed of result: Ultherapy is gradual; thread lifts are immediate.
• Downtime: Ultherapy is minimal; thread lifts involve more noticeable swelling and bruising.
• Sessions: both are usually single procedures with periodic repetition.
• Invasiveness: Ultherapy is non-invasive; thread lifting is minimally invasive, with needle entry points and a small infection risk.
• Comfort: Ultherapy can feel sharp or achy during treatment; thread lifts are done under local anaesthesia but feel tight afterwards.

Risks and who should be cautious

Ultherapy is generally considered low risk when performed correctly, but temporary numbness, nerve irritation, bruising or, rarely, fat loss in thin faces can occur. People with very thin faces sometimes worry about a hollowed look, which is one reason why energy settings and depth need to be individualised.

Thread lifts carry the risks of any minimally invasive procedure: infection, visible or palpable threads, asymmetry, dimpling, thread extrusion and persistent discomfort. These usually resolve or can be corrected, but they are more likely when too many threads are placed or the technique is poor.

Neither option is a good fit for very heavy jowls with significant excess skin, where a surgical facelift may give a more reliable result. People who are pregnant, have active skin infections, certain bleeding disorders or unrealistic expectations should also discuss alternatives first.

Which should you choose?

• Early jowling in your thirties or forties: Ultherapy or another HIFU device is often the gentler first step, especially if you want minimal downtime.
• Moderate jowls and you want a visible change before an event: a thread lift gives an immediate result, provided you allow time for swelling to settle.
• Heavy fullness along the jaw: lifting alone may not be enough; fat reduction or contouring may need to be part of the plan.
• Short trip to Seoul: Ultherapy fits easily into a busy schedule, while threads are better done early in the stay so you can attend a check-up.

Combining both is sometimes an option. Some doctors place threads for mechanical support and use ultrasound or radiofrequency lifting at a separate session to improve tissue quality. The order and timing should be decided by the treating doctor, as heating directly over freshly placed threads is generally avoided.

Practical tips for treatment in Korea

• Book a consultation before committing, and ask the doctor to explain which layer of your face is the main cause of jowling.
• Ask which device, how many lines or shots, and which thread type and number will be used, and request this in a written plan.
• Plan threads at least several days before a long-haul flight, and follow the advice on sleeping position and diet.
• Use sun protection and avoid saunas and vigorous exercise for the period your doctor recommends.

Conclusion

Ultherapy and thread lifts both have a place in treating sagging jowls. Ultherapy offers gradual, natural-looking tightening with very little downtime, while thread lifts deliver an immediate mechanical lift in exchange for more swelling and a slightly higher risk profile. The right choice depends on how much laxity you have, how quickly you want to see change and how much recovery time you can accept. A careful assessment by an experienced dermatologist is the best starting point.

This article is for general information only and is not a substitute for a medical consultation. Suitability, results and recovery vary from person to person.