Answered by Shaykh Faraz Rabbani
Is it permissible to insert a finger in to the anal tract in order to remove waste at the time of defecating?
Walaikum assalam wa rahmatullah,
It is improper to insert a finger into the anal tract itself, and not improper to clear the actual area of the opening gently. [As understood from Ibn Abidin, Radd al-Muhtar, quoting the scholars of the school.]
And Allah alone gives success.
Wassalam,
Faraz Rabbani