HIFU skin tightening: how it works and who it suits

Key takeaways

• HIFU heats deep layers, including the layer surgeons lift in a facelift, without cutting the skin.
• Change is gradual; studies measure results at about three to six months.
• It suits mild to moderate laxity and is less effective in severe sagging.
• Discomfort during treatment is the most common complaint; redness and swelling usually settle quickly.
• It is not a substitute for surgery, and it does not replace sun protection or volume support.

How does HIFU work?

See, what happens is, ultrasound is usually used to look inside the body. In HIFU, the ultrasound is focused, like sunlight through a magnifying glass, to a very small point at a set depth. At that point the tissue heats up enough to cause a tiny controlled injury, while the skin surface above is left intact.

A 2015 review in Clinical, Cosmetic and Investigational Dermatology describes the details:

• The focused energy heats small spots to above 60°C, creating thermal coagulation points smaller than 1 cubic millimetre each.
• Collagen begins to contract at around 65°C.
• The outer skin and top layer of the dermis are spared.
• The main target is the deeper support layer of the face, called the SMAS, and the thin muscle sheet of the neck.

The heat causes some immediate contraction, and the healing response then builds new collagen over the following months. That is why HIFU is a slow treatment, not an instant one.

What depths does it treat?

The same review describes different handpieces reaching different depths:

Normally treatment combines more than one depth. The review notes that dual-depth treatment and multiple passes improve results, and that treatment plans vary with age and degree of laxity.

Who is HIFU right for?

According to the review: - It is most suited to mild to moderate skin and soft tissue laxity. - Ideal patients tend to be younger, with normal healing. - Older patients with severe laxity and prominent neck bands should be considered for surgery. - Outcomes were better with a BMI of 30 or below. More than half of people with a BMI above 30 showed no change.

So in practice, HIFU suits someone who has noticed the jawline softening, the brows sitting a little lower or the skin under the chin loosening, and who wants a gradual, subtle change without surgery. That is very important to understand. If your skin is very loose or your jowls are heavy, HIFU will likely disappoint you, and I will say so.

Reasons not to have HIFU, per the review: infection or open wounds in the area, severe or cystic acne, and active metal implants such as pacemakers. Extra caution is needed with keloid scarring, implants, some long-lasting fillers and smoking.

What results can I expect, and when?

The review summarises study results measured at three and six months: - Brow: at 90 days, 86% of people in one study had a clinically meaningful brow lift, averaging 1.7 mm. - Neck and under the chin: at three months, about 69% showed improvement on blinded review. - Face and neck: at 180 days, about 78% showed improvement rated by doctors.

Two things to notice. First, 1.7 mm is a real but small change; this is subtle work. Second, not everyone improves. A 2017 review in the Journal of Drugs in Dermatology also notes that patients often rate their improvement higher than doctors do, which is why studies rely on satisfaction scores. The author of the 2015 review also disclosed a consulting role with a device manufacturer, which is worth knowing when you read the numbers.

Basically, expect a gradual tightening that builds over months, not a change in the mirror the next morning. A dermatologic surgeon quoted by MDedge notes that energy-based tightening can take around six months to show its effect.

What does treatment feel like? What are the side effects?

Discomfort is the most common effect. In the 2015 review, average pain scores during treatment were about 5.7 to 6.5 out of 10, depending on the area. Pain relief can be taken beforehand, and energy settings can be adjusted.

After treatment: - Common: redness and mild swelling for a short time, occasional bruising - Less common: temporary numbness, temporary muscle weakness, raised lines or marks on the skin (linked in the review to poor technique), and darkening of the skin after inflammation, which matters in Indian skin

Most people return to normal activity the same day. I give specific aftercare, and sun protection is essential afterwards.

How often is it repeated?

The review does not set a fixed number of sessions. Many people have a single treatment and review results over the following months. Some with more laxity need more energy or a further session. I plan the next step only after seeing how your skin has responded at around three to six months, rather than booking a package in advance.

How we approach this at Dr Tvacha

HIFU is among the skin tightening treatments available at our centres in Thane, Andheri, Bandra and Dahisar, alongside radio frequency and Intragen, which is radio frequency based. The Rs 499 face assessment checks whether laxity is your main concern and whether it is mild enough for HIFU to help. If it is, the plan and price are written down first. If it is not, I will tell you. Read about the Long Game Anti-ageing Plan, how HIFU compares in HIFU vs radio frequency, or the thread lift option.

Written by

Dr Amit KarkhanisAesthetic Physician · MBBS, Dip. Dermatology (UK) · Reg. No. 2001/02/1124

Founder of Dr Tvacha, practising in Thane since 2005. Leads the weight loss and hair programmes.