The problem with coccydynia is that every time you sit down you are aggravating and prolonging the problem. So the solution is not to sit, but to find a more comfortable position: walk, stand, lean, kneel, squat or lie. But we are expected to sit down to work, to eat, to travel, to relax. You can't very well go out for a meal with friends and stand up all the time. Coccydynia therefore makes it painful or impossible to carry on a normal social or working life. Here are some ideas to help:
Here is a selection of cushions and seat supports
Here is a selection of comfortable chairs.