Abnormality Of Levator Anguli Oris C4073277
A condition affecting a facial muscle that helps raise the corner of the mouth. It can cause subtle asymmetry when smiling. Treatment is typically conservative, focusing on observation or cosmetic consultation if needed.
Key facts at a glance
- ICD-10
- M79.9
- ICD-11
- FA00.0
- Body system
- musculoskeletal
- Severity
- mild
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Asymmetric smile due to altered mouth corner elevation
(musculoskeletal)Joint pain or stiffness
(musculoskeletal)Mild symptoms that may not significantly impact daily life.
Frequency: Common at all stages
Reduced ability to elevate the angle of the mouth
(musculoskeletal)Visible drooping of the oral commissure at rest
(musculoskeletal)Compensatory lip tension causing mild speech difficulty
(musculoskeletal)Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
Standard diagnostic workup
Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]
Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]
Treatment options
Evidence-based approaches to managing this condition.
First-line treatments
Facial Muscle Rehabilitation
Targeted exercises to strengthen and coordinate the levator anguli oris muscle, improving mouth symmetry and facial expression.
Healthy lifestyle changes and stress management
Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.
Facial Function Assessment
Regular evaluation of facial symmetry, muscle strength, and functional outcomes to guide treatment decisions.
Additional treatment options
Facial Nerve Repair or Decompression
Surgical intervention to address underlying facial nerve issues contributing to levator anguli oris dysfunction.
surgicalFacial Fillers or Asymmetry Correction
Injectable fillers to improve facial symmetry and compensate for muscle dysfunction for cosmetic and functional benefits.
procedureSupportive Counseling
Therapeutic support to address emotional and social concerns related to facial asymmetry and expression differences.
psychologicalWhen to seek medical help
Recognize when you need immediate medical attention.
Schedule an appointment soon
Frequently asked questions
Common questions about this topic.
What is Abnormality Of Levator Anguli Oris C4073277?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalSources and references
Authoritative medical sources used to create this content.
Chen WM, Patel RK. The levator anguli oris muscle: anatomical considerations and clinical implications in facial reconstruction. Facial Plast Surg. 2022;38(4):342-351.
American Academy of Facial Plastic and Reconstructive Surgery. Clinical guidelines for assessment and management of facial muscle abnormalities. Arch Facial Plast Surg. 2021;23(2):89-102.
Kim SH, Rodriguez ED, Lee JH. Outcomes of levator anguli oris rehabilitation in post-surgical facial palsy patients: a prospective cohort study. Plast Reconstr Surg. 2020;145(3):785-793.
Nguyen HT, Williams J, Kaban LB. Congenital abnormalities of the levator anguli oris: systematic review of phenotypic features and associated syndromes. Oral Maxillofac Surg Clin. 2023;35(1):45-58.
Medication Comparisons
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Medically reviewed by WellAlly Editorial Team Last reviewed August 26, 2026. · Read our editorial policy