Difference between anal fissures and haemorrhoids

Learn the difference between anal fissures and haemorrhoids.

I WAS in England recently and I had constipation because of the cold weather. This caused me to strain in the toilet. Suddenly, and very alarmingly, I felt something pop out. I believe it was a pile. I came home and went to a surgeon who told me I not only had piles, but also anal fissures. What is the difference?