For clarity reasons, a WSPS will be denoted in what follows by WSPS (U, t) = true. If the WFMS identifies a WSPS for U (R-type(T)) with regard to CT and Ctl (w), it starts a delegation process that returns true if it was able to bypass this WSPS and false elsewhere.
The kidneys are found in the upper back (the âsmall of the backâ, it is often called). Kidney disease can cause pain in this part of the upper back. Pain in this area is common, and often comes from the muscles of the back, or from the spine. Pain from the kidneys is often constant, or can be sharp, like being stabbed.
Possible causes of kidney pain include: 1  Bleeding in your kidney (hemorrhage). 2  Blood clots in kidney veins (renal vein thrombosis). 3  Urinary tract infection (UTI). 4  Arteriosclerosis / atherosclerosis (hardening of the arteries leading to the kidneys).owever, it's possible to have one of these conditions and experience few symptoms, including kidney pain. Kidney stones cause pain, but it's not referred to as kidney pain. Kidney stones generally are painless â or relatively painless â as long as they remain in the kidneys.