Shel1951
I have started getting pain in my knee and sometimes gives way when coming down the stairs, yet to see a doctor but a friend recommended magnesium cream from Amazon so have ordered it,
Giving it a go anyway nothing to lose
Be careful, that definitely sounds like osteoarthritis. I'd recommend seeing your GP sooner rather later so you can get referred to physio for helpful exercises to strengthen the muscles. I speak from experience and to be honest, I don't think magnesium cream will make much difference - you need to strengthen your knee to avoid it giving way and you falling.
Later, if problems continue, your GP can refer you to a specialist knee surgeon.