What does intersection syndrome feel like?

The friction on the wrist extensor tendons causes pain and swelling in the tenosynovium that covers these tendons. The friction hampers the smooth gliding action. You may hear a squeaking sound and feel creaking as the tendons rub against the muscles. This is called crepitus. You may have swelling and redness at the intersection point. Pain can spread down to the thumb or up along the edge of the forearm.