Ok so...i've this pain in my shoulders...though, i don't really notice it when i do full strength smashes or jump smashes... normally what i tend to do is place my left hand on my right shoulder and rotate my right arm...and when i do so...i feel this cranking of the joint... a small sharp pain also occurs right on top of my shoulder when i do my arm rotation warm up... so, i'm hoping that some of the more experienced players will shed some light on this injury...I really hope it isn't serious..
Could be a thousand reasons.... ...go and get it checked out by a doctor, preferably don't play in the meantime.
you may do some searches in BC. there is a lot that has same problem as you. i do believe if there is a doctor here, couldnt diagnose. as RichF suggest, please pay a visit to hospital or clinic nearby to check it out. get it heal and you will enjoy badminton more.
I do have the same problem with you last time till i could not raise my arm. So i suggest you better get it check by doctor and stop play till it heal.:crying: The probem can be prevent if you do a good warm up or some exercise.