The Compendium of Bheḷa 8.8.7

8.8.7

napratyāyātyadhovastirbhītasyonmathitasya vā | gudavalyāṃ tṛtīyāyāmarśobhir vā nivāritaḥ ||

the enema does not return downward in one who is frightened or agitated, / or blocked by hemorrhoids in the third rectal fold;