Also known as ‘trapeziometacarpal (TMC) osteoarthritis’, rhizarthrosis is arthritis of the first carpometacarpal joint of the thumb, the joint connecting the wrist to the metacarpus. The carpometacarpal joint of the thumb plays a critical role in the normal functioning of the thumb.

Treatment types

A mixture of phototherapy, ultrasound and magnetotherapy complemented by TENS, if desired.

Method of action


This form of therapy helps to build new tissue and ensure the proper alignment of the tissue fibres so that full strength and flexibility can be restored. In the case of a chronic illness, ultrasound can slow the development and help to manage symptoms.

Ultrasound therapy can:

  • Provide an analgesic effect.
  • Improve blood flow and restore normal cell activity to produce an anti-swelling effect.

Phototherapy — red light

Mitochondria within the skin cells are able to absorb red light particles. This can help the cells produce more adenosine triphosphate (the energy source of all cells).

Red light therapy helps to:

  • Increase fibroblast production which, in turn, produces collagen and other tissue fibres.
  • Reduce inflammation in the cells — both at the area of use and throughout the system.
  • Treat pain from musculoskeletal conditions.
  • Enhance bone recovery.


Magnetotherapy offers an anti-inflammatory and anti-swelling effect on top of its ability to reduce pain and improve blood circulation.


The electrical impulses reduce the pain signals going to the spinal cord and brain by temporarily ‘switching off’ the nerve endings of the affected area — thus, helping to relieve pain and relax the muscles. These impulses also stimulate the production of endorphins, which are the body’s natural painkillers.