Massage therapists lose their thumbs first.
Not gradually and not mysteriously — sustained deep pressure through the thumb, twenty or thirty hours a week, loads the joint at its base with many times the force applied at the tip. It is the most predictable occupational injury in manual therapy, and the therapists who last are the ones who stopped using their thumbs early.
The same applies to physiotherapists, hand therapists (yes us too), chiropractors, osteopaths and anyone else delivering force through their hands all day.
What the work does
- Sustained thumb pressure. Trigger point work, deep tissue, and any technique that parks the thumb on a spot and leans. Drives thumb base arthritis, often decades early
- Repeated gripping and kneading. Loads the elbow tendons and the flexor tendons at the base of the fingers
- Wrist held in extension while leaning through the hand. Compresses the carpal tunnel and loads the back of the wrist
- Long sessions with no break, back to back, with a client on the table and nowhere to put the load down
What turns up
- Aching at the base of the thumb, worst after a deep tissue day: thumb base overload, becoming arthritis over years
- Thumb-side wrist pain: De Quervain’s
- Night numbness in the thumb, index and middle fingers: carpal tunnel syndrome
- Catching at the base of a finger: trigger finger
- Inner or outer elbow pain: golfer’s elbow or tennis elbow
- Back-of-wrist pain when leaning through the hand: an extension overload, and it responds to changing the lean rather than to rest
You have a finite number of deep thumb hours. Nobody tells you the number, and most therapists spend half of it in the first five years.
The changes that keep you working
- Replace the thumb wherever the technique allows. Elbow, forearm, knuckles, supported fist, heel of hand. This is the whole answer, and most therapists know it and do it too late
- Use body weight, not hand strength. Pressure should come from your stance and your lean, transmitted through a stacked, neutral wrist. If your forearm is working hard, the force is coming from the wrong place
- Table height. Too high and you push with the arms; too low and you fold the wrist. Adjust it per client rather than per day
- Stack the wrist. Force transmits through a straight wrist and grinds through a bent one
- Tools for sustained points, where they fit your practice and your regulations
- Sequence the diary. Alternate deep tissue with lighter work. Four deep sessions in a row is the day that produces the injury
If the thumb already hurts
- Stop using it for deep pressure now, not once it gets worse. The joint does not recover its cartilage
- Thumb stability work and joint protection help — see thumb base arthritis exercises and joint protection
- A short thumb splint overnight and in flares, not all day
- Get it assessed before you rearrange your whole technique around avoiding pain, because what you are avoiding has a name and a stage
Get it looked at if
- Thumb pain is now present between clients rather than only during
- Grinding or crunching at the base of the thumb
- Numbness that persists after a session
- Pinch strength is dropping — jars, keys, lids
- You are already turning down deep tissue bookings
That last one is the honest marker. Therapists usually change what they offer before they admit there is an injury, and the change in the diary comes a year or two before the appointment.
Your hands are the practice. Everything else is a room and a table.
Every article on this site is written using the Closing Window Method: name the window your condition runs on, find where you are in it, and act while it’s still open.