I have lower back pain, usually in the evening or when i have sat down or lay down for any amount of time. My legs (from my knees to the top of my thighs) are feeling like they are cramping up - or like I have really tight jeans on - but I don t have them on. I have got haemochromotosis - and have abnormal liver function.
Lower back pain has many causes, but I agree with your doubt: it can be caused or at least influenced by hemochromatosis(joint are touched also with arthritis and arthrosis) as it touches many other systems apart from liver and so even your cramping up feeling, so what I'd suggest is a good monitoring and treatment of your hemochromatosis without underestimating other health problems that age carry with, like hemochromatosis.