been told to take a few days off (being 17 and hungry for money it hasn't gone down too well) not to drive unless my life depends on it and to take it easy on Monday when i go back ie no heavy lifting for a while.
It's no joke. I get Sciatica, starts in the back goes down to buttock and leg. Try to look after yourself and don't take risks. I work in construction and a lot suffer, 25 kg is the max but many lift more, not clever when you can be laid up for months.
I did put a joint out in my back called a fascet joint in the shoulder blade area, I did that cleaning my teeth, I couldn't sit down in comfort, that only lasted a day or 2.