
Learn more about Jawline Slimming at Skin Medical
A square jaw is often associated with a more masculine appearance. Jawline slimming aims to reduce the look of a square jaw and soften the angles to achieve a more feminine, oval appearance to the face.
The masseter muscles are large facial muscles located at the jaw. Their main function is to help a person bite down or chew. By injecting a muscle relaxant, the jawline can be made to appear slimmer.
The treatment works by reducing the contraction of the muscle, preventing it from clenching and bulging. As a result, the volume of the lower jaw area is reduced, presenting a narrower and more refined shape


At Skin Medical, we offer a range of treatments to address the Jawline Slimming effect. Our personalised treatment plans aim to restore your skin’s natural volume.
Results will develop gradually over a period of weeks. Initial effects can be seen around three weeks, with the full results generally peaking between eight and ten weeks. The effects of jawline slimming treatments can last up to one year. Regular treatments every six months can lead to better and longer-lasting results, as the muscle becomes less active and therefore smaller in size, depending on the individual patient.
The primary function of the masseter muscle is for chewing. Most patients do not experience any problems, as only part of the muscle is relaxed. However, some muscle fatigue is possible after chewing for a while. This is temporary and usually disappears within a week.
The procedure is practically painless and takes about 10 minutes. You can return to your usual activities straight afterwards, although it is advisable to refrain from exercise for 24 hours after treatment. There is no downtime after the procedure.
Following jawline slimming treatment at Skin Medical, some mild swelling, bruising and tenderness around the jaw area is entirely normal and typically settles within a few days. Most patients can return to their normal routine immediately after their appointment. Initial results are visible straight away, with the full slimming effect becoming increasingly apparent over six to eight weeks as the masseter muscle gradually reduces in size. Results typically last between six and eighteen months, with maintenance treatments recommended to sustain the outcome over time.
Jawline slimming at Skin Medical uses botulinum toxin injections into the masseter muscles, the large muscles at the jaw responsible for chewing and biting. By temporarily reducing the contraction of these muscles, the jaw gradually becomes slimmer and more refined in appearance, softening a square jawline and creating a more oval facial shape. All treatments are performed by Dr Sabika Karim following a personalised consultation, and are tailored to your facial anatomy and aesthetic goals. A consultation is compulsory before all treatments at Skin Medical.
To prepare for your jawline slimming appointment at Skin Medical:
During your appointment:
Jawline slimming is a well-tolerated procedure with minimal downtime for most patients.
You may experience:
These effects are entirely normal and should settle within a few days. Please contact us if you experience anything more severe or prolonged.
To allow the treatment to settle correctly and support the best possible result, please follow these aftercare instructions in the 24 hours following your appointment.
Jawline slimming works gradually as the masseter muscle responds to the botulinum toxin over the weeks following treatment.
Suitability for jawline slimming should always be assessed during a full consultation with Dr Karim. Treatment may not be appropriate if you have certain neuromuscular conditions such as myasthenia gravis, a known allergy to botulinum toxin or any components of the product, active skin infections in the treatment area, significant dental or jaw concerns that have not been assessed, or if you are pregnant or breastfeeding.
Jawline slimming is a safe and well-established treatment when performed by an experienced medical professional. However, please contact Skin Medical if you experience:
We are here to support you following your treatment and to answer any questions during your recovery and beyond.