Back Seized Up in the Car

To the Skalitsa farmhouse today a I try to drive there. No problem until we get there and I have to get out of the car. I couldn't move. We had to get a neighbour to help me out of the car as my back had seized up from being in a seated position for half an hour. What made it worse was they kept making me laugh which really hurt as well. Once in the house the wood burner was lit and a hot bath had and a lie down thinking how long this painful back has to last.