Hi ,Welcome to HCM and thanks for the query.
Hope you are doing good.Since you are having/had anorectal fissure and history of piles i would ask you to be on a healthy diet strictly,no spicy food,no deep fried,more water intake ,fruits and green veggies and salad intake.
Maintain proper personal hygiene and use antiseptic solutions like dettol
yes you might have got intestinal parasitic infection
,so these are the outcomes of it.
If the problem continues go for stool test
.take simple healthy diet and water intake a lot so that it may help the infection to vanish out.
Hope i helped you,gor any further help feel free to ask.
Dr Shilpi Gupta