Drum Editing Sore Hand

It's not an instant fix, but take a look at the ergonomics of your editing setup - if it's physically uncomfortable to work you may want to upgrade your desk, your chair, your mouse, or all three. I'd guess that something about your setup is making you position your arm/wrist/hand at an awkward or uncomfortable angle.

As for tomorrow, I'd go buy a brace a brace and put some ice on it. If possible, reschedule the next session and take an extra day off.
 
I do post audio, so I edit a ton. When I first started editing regularly, I used to get pretty sore, but now it's only when I'm really busy. Like Cory said, the best thing to do is to look at your setup and make some adjustments. I found that making sure my wrist stays straight and my hand never moves into an awkward position helps a lot, I have my desk and seat height adjusted so my forearm is perfectly parallel with the desk when my hand is on the mouse. Trackballs are the shit for editing and help minimize unnecessary movement. Learning some new quick keys might help too. I found some stretches to do online a few years ago to help with hand soreness, but never did them enough to figure out if they actually helped.
 
Try to change your way of holding the mouse. I usually start clicking with the middle finger when I get aches.
One of my friends uses his mouse with his left hand for similar reasons.
Even changing to a different mouse for the remaining editing might help a bit.
And put a timer to go off every hour and do some stretches and shake your hands for a minute or so.
I also try to spinn a powerball a little now and then.

And after you have finished the current editing do what the other guys said...

Currently struggling with this myself.
 
Thanks for the advice guys. Gonna change my mouse and maybe my chair asap. I'm sitting just a tad too low but that's enough to make things difficult.
Any suggestions for a good (but not overly expensive) mouse?
I used to be very fond of trackballs but never found one that combined good speed/low inertia and a useable wheel.
Also I've had only bad experiences with cordless mice. They always end up doing weird stuff.
 
what helped me is not to edit for long periods of time (+1hours) straight.
I also bought a trackball and switch to my mouse as soon as I feel any strain in my wrist.
everything you do repeatedly in the same position is bad for your hand but changing the mouse/trackball
helps a bit I found.
 
I found that making sure my wrist stays straight and my hand never moves into an awkward position helps a lot, I have my desk and seat height adjusted so my forearm is perfectly parallel with the desk when my hand is on the mouse.

This is important; I'd also add that your elbow joints should be pretty much at a 90 degree angle, and shoulders should be relaxed. I saw a professional ergonomist that specializes in musicians since we had a compulsory meeting with one at school. She said that this is the most important aspect, as is sitting straight and relaxed. All the gel pads etc. are often actually worse for you in the long run, since they don't make you change your posture and you might end up with a far worse problem like actual tendinitis.

Mousewise I haven't found a difference, I've used a Performance Mouse MX for a couple years now with no problems whatsoever, and I recently got a Magic Trackpad which is also fine (if not even more comfortable). I mostly find myself using the claw grip when using a mouse BTW, I find it much more accurate and comfortable than a palm grip, which requires more wrist movement compared to mostly fingers.
 
I find the flatter New mac Keyboards cause considerably less strain for me than the G5 white ones..., helps the wrists be at the right angle etc.
 
Any suggestions for a good (but not overly expensive) mouse?
I used to be very fond of trackballs but never found one that combined good speed/low inertia and a useable wheel.

I'm not sure if you meant a mouse other then a trackball, but I'm a big fan of the Kensington Expert Mouse. The big ball gives you way more control then trackballs with smaller ones and the scroll wheel functions fairly well. I do feel like excessive use of the scroll wheel does contribute a bit to hand pain though.
 
Good ergonomic chair, mouse etc is crucial if you are gonna do long hours of editing. And think of how you are actual sitting on the chair, how your neck is and so on.
 
Good ergonomic chair, mouse etc is crucial if you are gonna do long hours of editing. And think of how you are actual sitting on the chair, how your neck is and so on.

Fo sho.
Also editing on a laptop with a trackpad is the most painful, in every way,... thing ever!