I was suffering from anal fissure (first time in my life) from a week now. I immediately started taking medicines such as daflon 500 mg (decreases blood viscosity) and having (contains acetoflanac and paracetamol). I also applied diltiazem organogel (calcium channel blocker) on anus. After few days I got very much relief and also bleeding stopped. But the area of anus swelled where fissure was present. Every time I go to pass stool the area inflamates and goes back to normal when pressure is released. It doesn't contain puss also there is no pain. I doesn't know what is the cause of inflammation and how to get it cured.