This happens: This is a less known but common finding in influenza B infections or in any flu like illness that moves into that muscle group. If it is a simple flu, it would gradually improve over days/weeks. It can be a localized muscle inflammation from another agent & a review of the kids history/exam and testing is needed to sort out this issue.
Answered 3/30/2017
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4 doctors weighed in across 2 answers
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4 doctors weighed in across 2 answers
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