Hi, For a few years, i have had a ‘grumbling’ knee which needs replacing. Its now quite painful and also difficult to get around, eg:- I used to walk miles and now 100-200 yards is all I can manage after I have taken Paracetamol. I need to use public transport everywhere. My consultant tells me it isn't painful enough yet to operate. I think I have a reasonable high pain threshold, except when it comes to walking on pavements etc when it does become very difficult. I have at night woken up with pain several times. It takes some time to “settle” enough for me to walk around my flat each morning.