Individuals with square jawlines or thick masseter muscles often seek facial contouring to achieve an ideal shape. Facial slimming injections, also known as Type A botulinum toxin injections, are one method to refine facial contours. Aesthetic preferences vary widely—some favor square jawlines, while others, particularly women, aspire to a heart-shaped face.
The "facial slimming injections" celebrities receive are actually a substance called botulinum toxin (commonly known as "Botox"). It is a potent neurotoxin produced by Clostridium botulinum bacteria under anaerobic conditions, consisting of a high-molecular-weight protein.Botox blocks cholinergic nerve transmission, making it commonly used in neurology and ophthalmology to treat conditions like blepharospasm, facial spasm, hyperhidrosis, and torticollis.
Women often seek facial contouring to achieve an oval face shape, frequently due to prominent jaw angles.Due to the difficulty in controlling the extent and depth of muscle resection during jaw angle surgery, outcomes are often unsatisfactory. This procedure also increases the risk of complications such as bleeding, hematoma formation, infection, facial asymmetry, trismus (jaw locking), and prolonged muscle spasm. The use of Type A botulinum toxin to treat bilateral masseter hypertrophy is considered a revolutionary new approach.
Facial slimming injections are not a universal solution for facial contouring. They are unsuitable in many scenarios: for round faces caused by excess facial fat, liposuction to remove fat pads is more appropriate; for square or wide faces resulting from skeletal imbalance, surgical bone reduction is a more rational choice rather than relying on injections.
Patients may experience noticeable local swelling and warmth after injection, which is normal. Adverse reactions primarily include excessive jaw muscle weakness and effects from the toxin spreading to adjacent tissues. Some individuals report fever, discomfort, or fatigue following botulinum toxin injections.