Bell’s Palsy Following Lip Filler: A Rare Presentation – Association or Coincidence?

Background: Bell’s palsy is defined as facial weakness or paralysis due to damage to the facial nerve, also known as the VII cranial nerve. Usually, viral infections due to herpes zoster, influenza, or any upper respiratory tract infections could be a cause. Facial weakness can be accompanied by facial pain or discomfort on the affected side of the face. Facial nerve palsy post-lip fillers is a rare presentation. Case presentation: A 37-year-old female with no prior comorbidities presented with a 3-day history of left-sided facial pain and heaviness. It was triggered after she had undergone lip fillers. On clinical examination, she had left-sided Bell’s palsy. She was managed with steroids and analgesics. Conclusion: Facial nerve palsy is an uncommon presentation after lip fillers. There is not enough scientific evidence to show the cause of facial nerve palsy and lip fillers. This case report is to highlight the clinical presentation and management, as well as the possibility of such rare occurrences of post-lip fillers.