Hips (sciatica) hurt most and I find myself squirming. I also try to break up the sitting: ironing board is in the hallway, design board on the wall and cutting mat across the room. A dancer friend gave me a trick that works really well. You take 2 quart size freezer bags and put crushed ice in them and then added 3tbs. of rubbing alcohol (fill the bags only 1/2 full). Put the two bags into a gallon freezer bag, wrap a towel around it and sit on the bag for 20 minutes. If I'm really hurting I do this several times, waiting an hour inbetween. It helps the muscles and nerves not get inflamed. I hate cold so I throw a quilt in the dryer and wrap myself up in a nice warm cocoon while my butt freezes! Sometimes I cheat and sit on the ice while I sew.