Sushi chefs’ hand problems come from three sources:
- SHAPING RICE by repeated pinch and press,
- long single-bevel knife work, and
- handling raw fish with cold, wet, nicked hands
The overuse results are trigger finger, thumb base pain, carpal tunnel symptoms and forearm tendon pain. The cuts are fingertip and tendon injuries.
The one to know about is INFECTION: fish spines and cuts exposed to raw seafood carry bacteria that ordinary kitchen cuts don’t, and some of them move fast.
What the counter asks of your hands
- Nigiri. Every piece is a pinch of rice, a press with two fingers, and a turn in the palm. A busy service runs into hundreds of pieces
- Maki. Pressing and rolling rice through a bamboo mat with the fingertips and thumbs
- The knife. Long single-bevel blades drawn in pull cuts, with the index finger often braced along the spine
- Breaking down fish. Scaling, filleting, and pulling pin bones with tweezers in a fine, forceful pinch
- Cold and wet. Hands dipped in cold vinegar water between pieces, cold fish, ice and a cold counter. Cold hands grip harder
- Shellfish. Shucking knives slip, and the palm is where they land
- Sharpening. Long sessions on whetstones, the same wrist movement over and over
Tell the doctor you handle raw fish. It changes which antibiotic works.
Infections that come from fish
- A purple-red, painful, sharp-edged swelling on a finger a few days after a fish spine or bone prick: erysipeloid, sometimes called fish handler’s disease. It responds well to the right antibiotic
- A slow, firm lump or crusted nodule appearing weeks after a small wound: Mycobacterium marinum. It does not respond to standard skin antibiotics and needs specific treatment, so the fish history matters
- Rapidly spreading redness, swelling and severe pain within hours to a day of a cut exposed to raw seafood or seawater: possible Vibrio infection. Emergency, especially if you have liver disease, diabetes or a weakened immune system
- A finger held bent, swollen along its whole length, and painful to straighten: flexor tendon sheath infection. Same-day emergency
- A throbbing, swollen fingertip pad or nail fold: paronychia or felon
What else turns up
- A finger or thumb that catches or locks: trigger finger, from years of pressing rice
- Aching at the base of the thumb: thumb base overload, and in some chefs early CMC arthritis
- Night numbness in the thumb, index and middle fingers: carpal tunnel syndrome
- Thumb-side wrist pain with tweezers and scaling: De Quervain’s
- Outer elbow and forearm pain from knife work and breaking down large fish: tennis elbow
- Fingers going white and numb in the cold: Raynaud’s
- A cut followed by a finger that won’t bend or a numb strip down one side: tendon or nerve injury. See which cuts need more than stitches
The changes that make the most difference
- Cut-resistant glove on the non-knife hand for filleting and shucking
- Clean and cover every nick before touching raw fish again, and wear a finger cot or glove over it
- Press nigiri lighter. The rice should hold, not compact. Less force per piece, hundreds of times over
- Rice molds or forming machines for high-volume and conveyor service
- Warm your hands between cold tasks, and use lukewarm water for your hand bowl where the rice allows
- Keep the knife sharp. A dull blade needs more force and slips more
- Wider-grip tweezers for pin bones
- Rotate stations through the week: rice, knife, prep
Get it assessed if
- Redness and swelling spreading from a cut within a day: emergency
- A finger held bent and painful to straighten: emergency
- A lump or sore that appears weeks after a small wound and won’t heal
- A cut followed by a finger that won’t fully bend, or a numb strip
- A finger that locks, or numbness that wakes you
- Six weeks of overuse changes with no improvement
For the wider kitchen, see chefs and kitchen work.
For the splints involved, see the short thumb CMC splint.
A fish-spine prick that turns purple, or a nodule that won’t heal, needs a doctor who knows you handle fish.
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.