Im sorry to hear about your symptoms. Now there are a number of things which could be causing you this amount of pain. the first one which comes to mind is that you could have damaged on of the tendons or even more than one of the tendons in the wrist. This could be due to minor tears in the tendons or even a major tear depending on the amount of force which was applied. if this is the case then you would need a clinical examination and if needed a MRI would be done to determine the extent of the damage. in most cases rest, painkillers are adequate however in severe tears surgery may be needed.
Another cause of this pain can be severe muscle spasm or muscle sprain. If this is the case then you would need to apply topical voltaren gel on the region and use OTC painkillers like motrin and aleve. In addition you should apply ice on the area and apply a compression bandage. This can be followed by muscle relaxants as well.
lastly considering your joints it is possible that you may have dislocated one of the joints and if this is the case then you would need an xray of the wrist joint as well as the hand. this would be then treated with bringing the joint back into place.
Now i would suggest that you start applying the voltaren gel and use OTC painkillers but this does need to be evaluated by visiting your doctor and getting an xray done to start with.
Do you have any more questions?
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