-- The physician places his left hand on the patient's loin and using his right hand, taps with a moderate force on right hand overlying the kidney region on the loin. -- If the patient feels pain, the symptom "is positive" . -- This sign is mainly positive in PYELONEPHRITIS -- It may also be positive in nephrolithiasis, paranephritis, inflammation of pelvis, and also in myositis and radiculitis.