Cathisophobia (sometimes spelled with a ‘k’) is a terror of sitting down. This disorder can be sparked off by a particularly nasty case of hemorrhoids but in some serious cases it can be due to physical abuse relating to sitting on sharp or painful objects. Sometimes, the sitting fear is due to some punishment in the school days, or it may be an indication of some other phobia like sitting in front of elite and influential people. Cathisophobia is characterized by sweating, heavy or short breathe, and anxiety.