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Squarish/Round Lower Face

What Is a Squarish Lower Face?

A “squarish” or broad lower face usually refers to increased width or prominence along the jawline and jaw angle. While this can be a naturally occurring facial shape due to genetics, in some cases, it’s caused by enlarged masseter muscles – the strong chewing muscles located at the sides of your jaw.

This prominence can make the face appear more angular or masculine, especially when viewed from the front. Fortunately, modern aesthetic treatments can contour and slim the lower face without surgery.

What Causes a Squarish Jawline?

There are several factors that can contribute to a squarish or widened jawline:

Genetics: Some individuals naturally have a broader or more defined jaw structure.
Overactive Masseter Muscles: Habitual teeth grinding (bruxism), clenching, or excessive chewing can enlarge the masseter muscles over time, resulting in a more square appearance.
Fat Accumulation: Localised fat along the jawline or lower cheeks can blur contours and add width to the face.
Bone Structure & Aging: Over time, changes in facial fat and bone resorption can alter lower face proportions - sometimes accentuating the jaw area.

Common Concerns with a Broad Jawline

Square or heavy jawline

Less facial taper
(reduced “V-shape”)

Jaw tension or clenching due to tight masseters

Asymmetrical lower face shape

Desire for a softer, more feminine or contoured appearance

Common Concerns We See

Fine horizontal neck lines (often called “tech neck lines”) 
Sagging skin or loss of definition along the jawline
Crepey or wrinkled texture
Visible platysmal bands (vertical neck cords)
Uneven tone or sun damage

Effective Treatments for a Squarish Lower Face

1. Jaw Slimming with Botulinum Toxin (Masseter Reduction)

A small amount of neuromodulator is injected into the masseter muscles to relax overactivity and gradually reduce muscle bulk.

Softens a square or heavy jawline
Creates a more V-shaped facial contour
Can relieve jaw tension or teeth grinding
Results appear gradually over 1-2 weeks and can last 4–6 months

2. Jawline Contouring with Dermal Fillers

For those seeking a more defined or balanced jawline
(rather than slimming), strategically placed fillers can
enhance facial proportions.

Restores structure and contour
Harmonises lower face shape
Can be combined with BTX for a sculpted yet natural result

3. Energy-Based Contouring (e.g. HIFU, RF)

For patients with excess fullness or fat around the jawline and lower cheeks, these treatments help tighten and refine facial definition.

Reduces submental or jawline fullness
Tightens skin and improves contour
Non-invasive, minimal downtime

What to Expect After Treatment

Jaw slimming with Botulinum Toxin results are gradual, becoming noticeable within a few weeks.
With continued treatments, the masseter muscles naturally stay slimmer for longer periods.
For patients combining Botulinum Toxin + filler or HIFU, the result is a refined, contoured, and lifted lower face that still looks natural at rest and in motion.