i currently have a similar injury on my right hand, having 'done' my left a few years ago. i found a couple of weeks off followed by very controlled climbing to avoid exacerbating it for a few weeks. fortunately, you can carry on training - i find half crimps no problem, so i just stick to holds i know don't hurt it and try and be in control all the time. regular icing (a washing up bowl of cold tap water at this time of year is best).and don't be in denial, if it hurts, don't do it
Ice and heat does the trick (with a pinch of patience). Check out http://www.ithaca.edu/faculty/nquarrie/contrast.htmlor similar pages on contrast baths