If I knew CTD: If by ctd you mean connective tissue disease you haven't given us much information--there are a lot of ctds with lots of different symptoms. From your age, i'd bet lupus, sle, which can affect muscles and everything else. Don't stop running, just stay hydrated and wear sunscreen.
Answered 9/20/2013
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4 doctors weighed in across 2 answers
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A doctor has provided 1 answer
A doctor has provided 1 answer
2 doctors weighed in across 2 answers
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