Well, lets start off simple but with something really common. Fingers are injured so often in BJJ and many times if we think they are dislocated we just pull on them till they ‘clunk’ into place. Hey, that’s not a bad option.
To do this you have the person sit in front of you on the ground, and you gently grasp the end of the finger. Now just tell the person to take the weight slowly on their finger and you slowly match the resistance. Its really quite deceiving, but you usually need quite some pressure even to put back the very small end (distal phalanx) of the finger. There really should be no pain, and actually relief when the joint pops in. They should then be able to move it with some ease and it should look and feel normal. From there its the usual sporting injury care.
But, one thing though to watch out for is mallet finger. This is where the tendon tha make the finger extend is torn either partially or fully. Left untreated this can cause lifelong trouble, especially if its your dominant hand (bye bye ezekiels!!) Its usally easily fixed with a Mallet finger splint . For more info check out Mallet finger treatment. Happy choking!!