Hi thanks for asking question You have done anal fissure surgery. Now it will be under healing process so because of granulation tissue formation there might be itching ... Just now take care for few days with following measures. Avoid straining at stool. More water. Avoid excess spicy food and meat like food. If feeling constipating then laxative can be taken. Avoid smoking. Daily after bathing clean that area and allow dry because if it remain wet then chances of fungal infection can be there. If still your condition worsening then proctoscopy examination needed for further work up. Take care