Nutcracker syndrome is a rare condition that happens when the vein that drains your left kidney gets squeezed between big blood vessels in your belly. It can be very painful, but it's usually not ...

Each kidney typically has one vein that carries blood filtered by the kidney into the circulatory system. These are called the renal veins. Usually there’s one on the right and one on the left.

Lower back pain, fatigue, and nausea. Symptoms that could be caused by any number of illnesses, but they’re also the hallmark signs of a serious condition called nutcracker syndrome -- where the veins ...