Concern
Jawline Definition
A defined jawline contributes to a balanced, structured profile. Definition can soften with age or be less pronounced naturally — or, for some, the jaw can look wider or heavier than they'd like due to an overdeveloped jaw muscle.
Because 'definition' means something different for everyone, we tailor treatment to your goal: adding subtle structure where volume has been lost, or softening and slimming an overly square jawline for a more oval, refined shape.
Causes
What Causes Jawline Definition?
A less defined jawline usually comes from volume loss, skin laxity and changes in the lower face with age. A wider, more squared jawline is often caused by an enlarged masseter (jaw) muscle, from genetics or habits like teeth grinding (bruxism) — the opposite concern, but still about jawline shape.
What You May Notice
Signs & Symptoms
Softened contour
A less defined line between the jaw and neck, from volume loss or laxity.
Loss of structure
A mid- and lower-face that looks less sculpted than desired.
Wide or square jaw
A jawline that looks broader or heavier than desired, often from an overdeveloped jaw muscle.
Expert Tips
Dr Alexa's Advice
Balance is everything
Definition should suit your facial proportions for a natural result.
Consider chin and jaw together
Treating them in harmony creates the most flattering profile.
Identify your direction first
Adding structure and slimming a wide jaw use very different treatments, so an accurate assessment matters.
Treatment Options
How We Can Help
Your practitioner will recommend the right approach for you at consultation. Options we may consider for jawline definition include:
Jawline Filler
Dermal filler to sculpt and define the jawline for a sharper, more contoured lower face.
Learn more →
Dermal Fillers
Restore volume, balance and definition to the face with bespoke, natural-looking dermal filler.
Learn more →
Sculptra
A collagen-stimulating treatment for gradual, long-lasting restoration of volume and firmness.
Learn more →
Jaw Slimming
A botulinum toxin treatment that relaxes the masseter muscles to slim and contour the jawline and ease teeth grinding or clenching.
Learn more →Concerned about jawline definition?
Book a consultation with Dr Alexa in Mayfair and we'll create a plan tailored to you.
This page is for general information and does not constitute medical advice. Suitability is confirmed at consultation and results vary between individuals.