Did I say backache? I mean back pain, focused on my left kidney (but have no other symptoms of water infection). It really hurts - and I say this as somebody who has been having painful BHs for the last 3 weeks, and sacro-iliac pain on and off for months! Paracetemol, homeopathy, shower jets won't touch it. TENS helps and so does moving around. Neither of which is particularly practical in bed when the pain is at its worst. How normal is this and must I expect it to last for another 2 weeks?