Question on editing an object...

I have a question, probably a silly one. If I take an object, let's say a bed, and decide to edit it in Blender: I change the shape of the pillows, the shape of the headboard, the side of the feet, or the way the cover falls, etc. Changes without cutting the mesh or adding, just manipulating the original mesh. After I'm done do I need to re-rigged the manipulated bed with the original EA one or does the rigging and tuning stay put all through this manipulation?

Thanks in advance.