The cause of the pain on the ulnar side of the wrist is particularly difficult to determine. Small articulations are held by a complex structure of ligaments which, as with many ligaments, can sometimes get injured.
As with several other articulations, the problems with the meniscus of the wrist (rupture of the triangular ligament - TFCC) are treated with debridement using a camera (arthroscopy), but only after conservative treatment is attempted (rest, immobilization, occupational therapy, infiltrations).