I may be WFA, and if I am, can a mod please move. But my asshole ex "sensi" was demostrating wristlocks from a failed kimura to americana chain, and on me for the class,two weeks ago, and I felt something in my wrist click/pop, and I still hurts and clicks whenever I twist it, what should I do to handle this? I've been compressing it, and icing it every once and awhile. 
RICE=rest, ice compression, elevation. Keep doing that after each training. I like you use boxing hand wraps as wrist supports during training. This is also an excellent time to train with one hand, your good hand! 
Chael Sonnen Monkey,
R.I.C.E. is good for the first 72 hours after the injury. Beyond that, you need heat and movement. If this doesn't bring your wrist back to health, then you'll need to see a specialist about your wrist.
Take it from an old dog - someone who taught and advocated wrist locks and leg locks in Brazilian Jiu Jitsu LONG before they were accepted or taught by other BJJ instructors - wristlocks are no different than arm locks, leg locks or chokes. Some students / instructors know how to apply them correctly without injuring others. Unfortunately, there are many who do not know how to do this. All they know is speed, power and explosiveness :-/
Because of all the small bones in your hand, and because this area of your body is used so much - especially if it was your dominate hand - your injury may take six to ten weeks to properly heal. It sucks, but it is what it is. Make sure you allow your wrist to heal. Don't take ANY chances on exacerbating the injury!
Good training to you,
Roy Harris