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SkinTight™ Arm Tight · Anaesthesia and recovery
SkinTight™ Arm Tight is performed under local anaesthesia, but numbing the upper arms is different from numbing a small patch of facial skin. A larger area is treated, the anaesthetic is spread through the tissue beneath the skin, and that fluid influences how the arms look and feel for the rest of the day. Understanding this can make the experience during and after treatment easier to interpret.
The essential idea
In body treatments, the anaesthetic is also part of the technique. Diluted anaesthetic fluid spread through the treatment area numbs it, firms the tissue and temporarily makes the arms look fuller. Some of that fluid may leak from entry points afterwards. These effects are expected, but heat, sharp pain or unusual symptoms should always be reported.
Numbing a wider area than a facial treatment
For small procedures, a few millilitres of local anaesthetic may be enough. Treating the upper arms involves a larger surface and a deeper layer of tissue. A common approach in body contouring is infiltration of a larger volume of diluted anaesthetic solution into the area to be treated, a principle that developed from tumescent techniques used in liposuction and other dermatological surgery.
The entry points are numbed first with a small injection. The diluted solution is then spread through the treatment plane using a fine cannula. As it spreads, the tissue becomes firmer and fuller, which helps both comfort and the controlled movement of the instrument beneath the skin. The exact technique and volume used depend on the plan for each patient.
Our article on what happens at a SkinTight™ Arm Tight consultation explains how suitability and the treatment boundary are assessed before this stage.
From entry points to energy delivery
The sequence of sensations is fairly consistent, although how strongly each one is felt varies between people.
Entry points
A brief sting
A small injection numbs each point where the cannula will enter the skin.
Infiltration
Fullness and pressure
As the solution spreads, the arm may feel heavy, tight, cool or swollen. This is the fluid, not a sign of injury.
Waiting
Time for the effect
A short interval may be allowed for the anaesthetic to work through the area before energy delivery begins.
Energy delivery
Warmth and movement
As radiofrequency energy is delivered beneath the skin, you may feel warmth, pressure and movement of the cannula. Burning or hot spots should be reported at once.
Warmth is expected because the treatment works by heating tissue in a controlled way. The device and clinician monitor temperature, but your feedback adds another layer of safety. A spot that feels hot, sharp or burning may indicate that energy delivery needs adjusting.
Treating both arms: positioning and total dose
Both arms are usually treated in the same session, one after the other. You may be asked to lie with your arm supported away from the body, or to change position between sides. Holding a position for some time can cause shoulder or neck stiffness, so let the team know if you need to move.
Because a larger area is treated, the total amount of local anaesthetic is planned carefully. Safe limits depend on body weight, the medicine and concentration used, and whether other areas or combined components are treated on the same day. A narrative review of local anaesthetic systemic toxicity in plastic surgery explains why total dose is calculated across a procedure rather than area by area.
This is one reason why adding further areas on the day is not simply a matter of preference. If arm liposuction or another component is planned alongside Arm Tight, the anaesthetic plan has to account for both.
Sensations to report during treatment
Speaking up during treatment is part of keeping it safe. Tell the team immediately if you notice any of the following.
| What you notice | Why it matters |
|---|---|
| A hot, burning or sharp spot | Energy delivery or anaesthetic coverage may need adjusting to reduce the risk of a burn. |
| Tingling or electric sensations into the forearm or hand | Nerves run along the inner arm; the position of the instrument may need to change. |
| Numb lips, metallic taste, ringing ears or light-headedness | These can be early signs of a reaction to the anaesthetic and need prompt assessment. |
| Nausea, sweating or feeling faint | Often a fainting-type response, but the team should monitor you and adjust your position. |
| Chest discomfort or difficulty breathing | Always needs immediate attention. |
Some people worry that mentioning discomfort will make the procedure longer. In practice, it allows the team to pause, check and continue more safely.
The first hours: fluid, firmness and compression
After treatment, the arms may look and feel larger than before because some anaesthetic fluid remains in the tissue. It is gradually absorbed, and some may leak from the entry points, sometimes tinged pink with blood, for several hours or longer. Absorbent dressings and protective layers for clothing and bedding are commonly advised.
A compression garment may be recommended, often for one to three weeks, to support the treated tissue and help manage swelling. The arms may feel heavy, tight or bruised, similar to an aching muscle, as the anaesthetic wears off over the following hours. Pain relief should be taken as advised by the treating team.
Our article on how SkinTight™ Abs Tight is planned explains how energy delivery and combined components are decided, which also influences how recovery feels.
In the following weeks
Tenderness, bruising and swelling usually settle over days to weeks. The treated tissue may feel firm or lumpy for a time, and patches of skin may feel numb, tingly or oversensitive as small nerves recover. A fluid collection beneath the skin is a recognised possibility after subdermal treatment and may need to be assessed.
Some swelling may move down towards the elbow or forearm with gravity. Changes in contour continue to develop over months as healing and remodelling progress, so the early appearance is not the final result. Outcomes vary and cannot be guaranteed.
Contact us promptly for an unexpected or worsening change
Seek advice for blistering or a change in skin colour, increasing pain, fever, spreading redness, discharge, a swelling that keeps enlarging, or tingling and weakness in the hand. Seek urgent medical help for chest pain, breathlessness, or a painful, swollen arm with discoloured hand or fingers.
What is discussed about anaesthesia beforehand
Before treatment, the team should ask about previous reactions to local anaesthetic, heart rhythm problems, liver disease, pregnancy or breastfeeding, a history of fainting, and all medicines and supplements. Your weight may be recorded because it affects safe anaesthetic limits. Do not stop prescribed medicines without advice.
If Morpheus8 is part of the plan, a different approach to numbing the skin surface may be used for that component. Ask how each part of the treatment will be anaesthetised, how long the appointment is expected to take and what you should bring, including loose clothing that fits over a compression garment.
Information on choosing who carries out your procedure and the GMC guidance on cosmetic interventions set out what patients can expect from consent discussions, including time to reflect.
Frequently asked questions
Will I be asleep for Arm Tight?
Why do my arms look bigger straight after treatment?
Is warmth during treatment normal?
Why is fluid leaking from the entry points?
How long does numbness last after Arm Tight?
Can both arms be treated at the same appointment?
Individual assessment
Ask how anaesthesia and recovery would work for you
A consultation can explain how the arms are numbed, what the treatment day involves and what to expect in the first weeks.
Medical and regulatory sources consulted
- Dr Ducu Clinics — SkinTight™ Arm Tight
- NHS — Local anaesthetic
- Tumescent Anesthesia for Dermatosurgical Procedures Other Than Liposuction (Journal of Cutaneous and Aesthetic Surgery, 2020)
- Tumescent liposuction (Clinics in Plastic Surgery, 2013)
- Local Anesthetic Systemic Toxicity: A Narrative Literature Review and Clinical Update on Prevention, Diagnosis, and Management (Plastic and Reconstructive Surgery, 2019)
- Use of Radiofrequency-Assisted Liposuction (BodyTite) for Upper Arms Lifting (Aesthetic Plastic Surgery, 2023)
- Subdermal radiofrequency treatment for tightening of the upper arms
- A Systematic Review of Subsurface Radiofrequency Treatments in Plastic Surgery (Annals of Plastic Surgery, 2022)
- NHS: Choosing who will do your cosmetic procedure
- GMC: Guidance for doctors who offer cosmetic interventions
- ASA/CAP: Guidance on marketing cosmetic interventions
Medical note: This article provides general information for adults considering SkinTight™ Arm Tight. It does not replace individual medical advice. Anaesthetic techniques, sensations, recovery and outcomes vary between patients and cannot be guaranteed. Follow the treating clinician’s instructions and seek help for unexpected symptoms.