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U r diagnosed with fissures in Ano by ur dr it demands soft stool and lubrication at Lips of Anus to heal those cracks i.e. fissures.
Arushtham will make stool soft but isabgol will make it bulky so wouldn't add value. If still have concerns plz consult ur treating dr
Next Steps
hopefully you are doing seitz bath with warm water for 20-30 min by applying oint on anus prior n after motion n seitz bath
Health Tips
add ghee 3-4 tsf to dal and butter Milk after food (5-7days) will make u gas free