May be a bit different, I ride a motorbike thats always had a reputation as a built for comfort machine. Now sfter about an hour I get a numb bum, not quite pins and needles. More recently noticed getting the same feeling when sitting around the house. 
Just hope its not another complication of the D, I do suffer from syactica though the feelings are not the same as when the syactica strikes.
Just hope its not another complication of the D, I do suffer from syactica though the feelings are not the same as when the syactica strikes.