Razo's Kiss
A way of understanding the wrist: how the two forearm bones should meet and what happens when a TFCC injury pulls them apart. Named and taught by Consultant Hand Therapist, Ms Michelle Razo, CHT.
Razo's Kiss describes the healthy relationship between the two forearm bones at the wrist. The radius and the ulna meet at the distal radioulnar joint (DRUJ). In a healthy wrist, they stay together through every turn. They kiss.
When the triangular fibrocartilage complex, the TFCC, is damaged the bones lose their hold and splay apart. That splay is what makes everyday movements like wringing out a cloth or bearing weight through the wrist painful.
Kiss and splay
Two states of the same joint
Ms Razo introduced Razo's Kiss to clinicians at the University Medical Center of El Paso in May 2025. She presented it again at Hamad Medical Corporation in Doha, Qatar in September 2025. The concept originated in her clinical practice, where she had used it to explain the injury to patients, before she formalised it for presentation to peers.
A painful wrist when you
twist or take weight?
Ulnar-sided wrist pain and a sense of the wrist giving way can point to a TFCC injury. A specialist Hand Therapy assessment can find out what is happening and start you on the right plan.