In short. Tenderness and swelling for days are expected. Transient nerve irritation can follow, and the change can only be judged months later.
Key points
- Not in the first week, and not in the first month.
- The intended effect develops as the heated tissue responds over the following months, which means the honest point of judgement is several months after the session.
- Patients who judge at two weeks almost always conclude that nothing happened, and patients who judge at six months are looking at the result.
Ultrasound has no incision and no anaesthetic, and it is easy to hear that as no recovery at all. That is not accurate. The treatment delivers heat into tissue at depth, and tissue that has been heated is tender afterwards. Knowing what the days are like, and what a change in sensation means, is the difference between a week that feels normal and a week spent worrying.
The days afterwards
The treated area is tender to the touch and often swollen for several days, and some patients describe a bruised feeling rather than a surface soreness. The surface itself is usually intact, so there is nothing to see, which is why the discomfort can be surprising. Make-up can be worn and ordinary work is usually possible. The tenderness settles over days to a week or so, and it is expected rather than a complication.
Numbness and altered sensation
A change in sensation in the treated area is reported after ultrasound, and it happens because the heat can irritate small nerve branches on its way to the target depth. Most people describe a patch of numbness or a feeling of altered sensitivity. It is usually transient and settles over weeks to a few months. It is not usually a sign that something has gone wrong, and it is not usually permanent. What matters is that it is reported and followed rather than ignored, and that it is not described in advance as something that cannot happen.
When the change can be judged
Not in the first week, and not in the first month. The intended effect develops as the heated tissue responds over the following months, which means the honest point of judgement is several months after the session. Patients who judge at two weeks almost always conclude that nothing happened, and patients who judge at six months are looking at the result. Photographs taken in the same light before treatment and at that point are the only fair comparison.
What is not expected
Blistering, breaks in the skin, a burn mark or a change in the surface that persists are not part of normal recovery. Nor is pain that worsens rather than settles, or swelling that increases after the first few days. Loss of movement in part of the face is not expected and needs immediate assessment rather than waiting. These are uncommon, and they are the reason the treatment should be performed by someone who can recognise them and who has a plan for what happens next.
Arrange review rather than waiting
- Blistering, a break in the skin, or a mark on the surface that is not settling.
- Pain that is worsening, swelling that is increasing after the first few days, or fever.
- Weakness or loss of movement in any part of the face, or altered sensation that is spreading rather than settling.
The most useful preparation is to place the treatment where a few tender days will not matter, and to judge the result on the timescale the treatment actually works on. A patient told in advance that the skin will be tender for a few days, that sensation may change temporarily, and that the effect takes months to appear has been given the information that makes all three unremarkable.
Frequently asked questions
Is numbness after ultrasound normal?
A change in sensation in the treated area is reported and is usually transient, settling over weeks to a few months. It happens because heat can irritate small nerve branches. It should be reported to the clinic and followed rather than ignored, and sensation that is spreading or not improving with time needs review rather than patience.
How long should I take off work?
Most people take no time off. The area is tender and may be swollen for several days, but the surface is intact, make-up can be worn and ordinary work is usually possible. It is worth avoiding a treatment immediately before an event, since tenderness is at its most noticeable in the first days rather than later.
Can I have another treatment before the first one has settled?
No, and there is no reason to. The effect of the first treatment develops over months, so a second session before that has happened adds tenderness and cost without adding information. The interval your clinic gives you should be based on how the tissue is responding, not on a fixed promotional schedule.
Risks & Limitations
- A facelift leaves permanent scars that mature over a year or more but do not disappear, and it cannot be undone.
- Operative risks include bleeding under the skin that needs drainage, infection, poor healing at an incision edge and nerve injury.
- Ultrasound carries no anaesthetic risk and no scar, and it can cause tenderness, temporary altered sensation and, rarely, surface marking.
- Ultrasound fades over months to about a year and is repeated; how much firming an individual gains cannot be predicted.
When to Seek Care
- A collection of blood under the skin, a wound that opens, or spreading redness with fever after an operation.
- Difficulty breathing or chest pain — seek emergency care immediately.
- Weakness or loss of movement in any part of the face, or altered sensation that is spreading rather than settling.
- Blistering, a break in the skin or a surface mark after ultrasound that is not settling.
References & Further Reading
- American Society of Plastic Surgeons (ASPS) — procedure and safety guidance
- National Institute for Health and Care Excellence (NICE, UK) — relevant guidance
- Cochrane Library — systematic reviews
- American Academy of Dermatology (AAD) — skin treatment and pigment guidance
- Chinese Medical Association Plastic Surgery Branch — clinical guidance
This page is patient education, not medical advice, and it does not cite individual studies. Discuss your own case with a qualified clinician. To arrange an assessment at Chongqing West District Hospital, see Contact & Consultation.