I stopped drinking coffee a few days ago because of tendinitis, I read where stopping it may help, which it seems to so far. But in place of the coffee, I decided to drink just hot water with a slice of lemon in it. The next morning I had a lot of pain in my lower back, thinking maybe my hip was out of place, and this lasted three days. On the third day I quit the lemon water, thinking maybe it was irritating my kidneys. The pain is almost gone. I have had several bouts of kidney infections and bladder infections in the past where I don't have pain or burning, so then I end up with a kidney infection. I haven't had one for over a year. I have been told not to take cranberry capsules because they can be irritating to some people. I have been tested before thinking I had an infection, when it was only something acidic I ate. No infection. So is it possible, like the cranberry capsules, the lemon water,especially on an empty stomach could be causing the pain? I have no fever, chills, lethargy, bladder irritation. Just low back pain, but now minimized. I am 48, 145 lbs, 5' 8". Take no meds,have no medical conditions at this time.