Hadith.2650 - It was narrated from Mu'awiyah ibn Ammar, who said:
I asked Abu Abdullah عليه السلام about a Muhrim using a miswak (tooth-stick).
Imam عليه السلام said: "Yes."
I asked: "What if it causes bleeding while using it?"
Imam عليه السلام said: "Yes, it is part of the Sunnah."