i get pain in the lower back too, sometimes the pain is more severe on my left.
I'm 26 this year, female. In my younger years, i was a sports person. However, when i started working about 3 yrs ago, I have stopped excercising almost completely.
2 years ago, i get allergy reaction to foods that I have never been allergic to. My lower back now also aches after i have a meal outside (Most of the time, it's chinese food). When i drink alcohol, i turn white instead of pink.
I have a friend who is undergoing treatment for her kidney problems, said that it sounds like my kidneys & liver are not comfortable
with the food/drinks i consume. Sometimes, when i drink coffee, i can smell coffee in my urine.
Most doctors will tell you there's nothing seriously wwrong. I don't believe them.
So i've started to cut down on flavoured drinks (just drinking plain water), eat at home, started jogging 2x a week, and avoid my usual titbits and preserved foods(my fav), and i do drastic improvements to my backaches. basically, by adopting a healthier diet, the kidneys & liver are less stressed out, and hence, don't cause so much pain. and it sure sounds like a lifetime committment.
see if this helps.