Which of the following symptoms would suggest a serious complication post-mastoidectomy?

Facial drooping is a significant symptom that can indicate a serious complication following a mastoidectomy. This procedure involves the removal of infected mastoid air cells and surrounding structures to address chronic ear infections or other related issues. The proximity of the facial nerve to the surgical site means that any manipulation or trauma during the procedure can lead to nerve damage or dysfunction.

When a patient experiences facial drooping post-surgery, it suggests potential facial nerve injury or compromise. This could result from direct trauma during surgery or swelling that impacts the nerve's function. If facial nerve damage occurs, it may manifest as weakness, drooping, or paralysis of the muscles on one side of the face, leading to concerns about ongoing or permanent complications.

On the other hand, persistent pain, continuous ear drainage, and difficulty hearing can occur post-operatively, but they may not indicate an immediate life-threatening situation or serious nerve injury. While these symptoms may warrant further evaluation and management, they do not typically suggest the same level of urgency or severity as facial drooping does.