Guitar produces two completely different problems in the two hands, and treating them as one thing is why players stay sore.
The fretting hand does sustained finger work in awkward positions. The picking hand does fast repetition with almost no load. The tissue that fails is different in each.
Almost all of it is volume, and almost all of it appears within weeks of something changing.
The fretting hand
- Aching in the palm and forearm after long sessions: usually just overuse, especially after a new song, a capo change, or a jump in practice hours
- Pain at the base of a finger, with catching or a click: trigger finger, from sustained hard pressing
- Thumb pain behind the neck: the thumb is doing counter-pressure it does not need. Usually a technique issue before it is an injury
- Numbness in the ring and little fingers: cubital tunnel, because a fretting elbow is bent and often compressed against the body for hours
- Pain on the little-finger side of the wrist: classical position and low-slung electric both push the wrist into deviation — see TFCC injury
The picking hand
- Forearm aching and pumping during fast passages: exertional forearm pain, where the timing is the diagnosis
- Thumb-side wrist pain, worse with heavy strumming: De Quervain’s
- Pain further up the back of the forearm with a creaking feeling: intersection syndrome
- Numbness in thumb, index and middle: carpal tunnel syndrome, often from resting the wrist hard on the bridge
You need far less pressure to fret a note than you are using. Press until the note buzzes, then add only what stops the buzz. That is the pressure.
The setup changes worth making first
- A proper setup. High action and heavy strings mean more force on every note. A professional setup with lower action changes the load on your fretting hand more than any exercise will
- Lighter gauge strings during a flare, and while building back
- Raise the guitar. Slung low forces the fretting wrist into extreme flexion. A shorter strap, or a footstool for classical, brings the wrist towards neutral
- Thumb behind the neck, not wrapped over, for anything demanding
- Thicker pick if you grip hard. A thin pick encourages a tight pinch to control it
Practice, which is where the injury actually comes from
- Break every twenty to thirty minutes. Hands open, arms down, shake out. Non-negotiable in a long session
- Build hours gradually. Doubling practice time for an audition, a gig or a grade is the classic history behind a guitarist’s hand injury
- Warm up with slow, easy playing rather than launching into the hard passage
- Stop for the day at the first ache, not at the point where you cannot play
The one that is not an injury
If a finger curls, lifts or refuses to obey during playing — specifically and only during playing — and the hand is completely normal for everything else, and it does not hurt, that is not overuse.
That is focal dystonia, and rest does not fix it. It needs recognizing early rather than being practiced through.
See musicians’ hand and wrist pain.
Get it assessed if
- Numbness or tingling in any fingers, during or after playing
- Pain present before you pick the instrument up
- A finger catching, locking or not fully straightening
- Six weeks of reduced volume and a better setup with no change
- A finger that disobeys without pain
The guitar is not the problem. The hours you added last month are.
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.