Orbicularis oris Botox: what to know

The orbicularis oris is a circular muscle around the mouth. Relaxing part of it can reduce the movement that folds skin above or around the lips, but the result depends on the line pattern, muscle strength, skin quality, and injection plan. The treatment does not add volume; a dermal filler works differently by placing material beneath the skin.

Temporary weakness can affect lip pursing, drinking through a straw, pronunciation, smiling, or the way makeup sits. Effects usually develop over several days and gradually wear off as nerve signals recover. More information is available under [Botulinum Toxin Type A](/materials/botulinum-toxin-type-a/) and [Wrinkles](/symptoms/wrinkles/).

Choose a qualified medical injector who examines your lip movement at rest and during speech, smiling, and pursing. Share your medical history, previous injections, medicines, allergies, neuromuscular conditions, and any difficulty swallowing. Follow the clinic's aftercare instructions, avoid rubbing the area, and arrange review if the response seems uneven. Discuss whether [Botox](/treatments/injectables/botulinum-toxin-injection/) or [Dermal Fillers](/treatments/injectables/dermal-fillers/) better matches the concern.

Seek urgent medical help for trouble breathing or swallowing, widespread weakness, severe allergic symptoms, or rapidly worsening facial swelling. Contact the injector promptly for marked asymmetry, inability to close the mouth comfortably, significant speech change, or eye symptoms after treatment.

Ask which muscle movement is being treated, how lip function will be protected, when effects should appear, what temporary changes are possible, and what plan applies if the result is uneven.