i had that once. it only occurs when the person is eating chili food, lack of water so everytime they vowel it's really hard, that sometimes blood come out. so if you want to avoid this. drink lots of food and you have to vowel everyday.

Heheh, anal fissure bob is a classic.

If you don't work in a cubicle there's no need to work from a chair. Get yourself a reclining support of some sort and work lying down. Plus you feel like a roman emperor :)