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  Sciatica Sciatica (also called lumbosacral radiculopathy) is pain along the sciatic nerves. These nerves run from the lower back, through the buttocks, and down the legs, ending just below the knee.  Symptoms Diagnosis Prevention Treatment Sciatica On each side of the body, the sciatic nerve runs from the lower spine, behind the hip joint, down the buttock and back of the knee. There the sciatic nerve divides into several branches and continues to the foot. When the sciatic nerve or the nerve roots that make up the sciatic nerve are pinched, inflamed, or damaged, pain—sciatica—may radiate along the length of the sciatic nerve to the foot. Symptoms of Sciatica Sciatica usually affects only one side. The pain is felt from the low back, through the buttock, and down the back of either leg. The pain is typically burning, shooting, or stabbing. Pain that starts in one place but travels to another, usually along the path of a nerve, is called radiating pain . Sciatica...

  Excessive or Frequent Urination Causes | Evaluation | Treatment | Essentials for Older Adults | Key Points Topic Resources Most people urinate about 4 to 6 times a day, mostly in the daytime. Normally, adults pass between 3 cups (700 milliliters) and 3 quarts (3 liters) of urine a day. Excessive urination can refer to An increased volume of urine (polyuria) A normal volume of urine with the need to go more often (urinary frequency) Both Urinary frequency may be accompanied by a sensation of an urgent need to urinate ( urinary urgency ). Many people particularly notice polyuria because they have to get up to urinate during the night (nocturia). Nocturia also can occur if people drink too much fluid too close to bedtime, even if they drink no more than normal overall. Causes of Excessive or Frequent Urination Some of the causes of increased urine volume differ from those of too-frequent urination. However, because many people who produce excessive amounts of urine also ne...