😲 Tap… and the face twitches! This is called Chvostek sign 👇 🧠 Percussion over the facial nerve ➝ causes ipsilateral facial muscle contraction ⚠️ It’s a classic clinical sign of hypocalcemia (low calcium) 🤯 BUT here’s the twist: ➡️ 10–20% of normal people can also show this sign even with normal serum calcium! So remember: 📌 Positive Chvostek ≠ always hypocalcemia Medicine loves exceptions 😏 #ChvostekSign #Hypocalcemia #ClinicalSigns #MedicalExam #MedStudent #USMLE #PLAB #MBBS #NursingTok