Sweater Two, Installment Two: Montview Cardigan

On to the collar!  Body was blocked and the shoulders seamed, and I finished the sleeves in just over a day each (so fast because they're just a garter band and reverse stockinette). 

Then I picked up nearly 300 stitches, and have been furiously knitting the garter stitch collar.  I've been at it since yesterday evening, and my right hand and wrist are hurting now, because of the weight of the sweater pulling.  Have you ever knit until your hands hurt?  What do you do to soothe them?