Yahya related to me from Malik from Alqama ibn Abi Alqama that his mother said, "I heard A'isha, the wife of the Prophet ﷺ being asked whether some one in ihram could scratch their body or not, and she said, 'Yes, he can scratch it and do so as hard as he pleases. I would scratch even if my hands were tied and I could only use my feet.' "
أَنَّهَا قَالَتْ سَمِعْتُ عَائِشَةَ زَوْجَ النَّبِيِّ ﷺ تُسْأَلُ عَنِ الْمُحْرِمِ أَيَحُكُّ جَسَدَهُ فَقَالَتْ نَعَمْ فَلْيَحْكُكْهُ وَلْيَشْدُدْ وَلَوْ رُبِطَتْ يَدَاىَ وَلَمْ أَجِدْ إِلاَّ رِجْلَىَّ لَحَكَكْتُ