What ?: Do you mean upper back muscle twitch? If yes, see if the area muscles are visibly twitching; that is not related with kidneys. Meanwhile, it's good idea to collect the feature, degree, and progress of the symptoms with their detailed sequence of events, and bring those to see doctor who will usually review what you submitted, history, physicals, and tests as needed and provide reasonable rx.
Answered 3/22/2014
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