Chapter on What is Permissible and Impermissible for the Muhrim to Do and Use of All Types

Mu'awiyah ibn Ammar asked him about a person in the state of ihram who scratches their head, causing one or two lice to fall off. Imam عليه السلام said: "There is no penalty upon them, nor do they need to replace the lice." He asked: "How should the person in ihram scratch?" Imam عليه السلام replied: "With their nails, as long as they do not cause bleeding or cut any hair."