What is a popliteal nerve block?

A popliteal nerve block is a shot of numbing medicine that blocks pain from the lower leg. It's used for some procedures on the foot or ankle. It can also help reduce pain after a procedure.

The nerve block goes into the back of the knee, in the space called the popliteal fossa. It works by numbing the sciatic nerve, which runs down the back of the leg behind the knee.

How is a popliteal nerve block done?

Before a popliteal nerve block, you may get medicine to keep you relaxed and comfortable.

The doctor may use ultrasound or another imaging method to help guide the nerve block needle.

After finding the right spot, the doctor uses a tiny needle to numb the skin. Then he or she puts the nerve block needle into the numbed area. You may feel some pressure. But you should not feel pain.

What can you expect after a popliteal nerve block?

The shot will leave your lower leg and foot partly or totally numb for a while. Your doctor will tell you how long. Follow your doctor's instructions carefully.

You will need someone to drive you home.

As the block wears off, you will start to feel some pain from the surgery. Be sure to take your pain medicines before the pain gets bad.

Problems from a nerve block are rare. There is a small risk of problems like seizures, heart problems, damage to nerves, infection, or bleeding. The benefits usually outweigh these risks.