When treating the orbicularis oris, your depth of injection can make or break both comfort and results. ❌ Inject too superficially (intradermally), and you’ll cause unnecessary pain — plus, you won’t reach the muscle. ✅ Go just beneath the dermis, onto the surface of the muscle, where the receptors are most likely to be — or slightly deeper for certain cases. ⚠️ Inject too deep, and you risk your toxin ending up inside the oral cavity — ineffective and wasteful. 💡 Depth control = better results