Your question: I don't think it is anything abnormal. You don not need to worry about it. The cremaster muscles in the scrotum can contract while running and cause the testicles to retract.
Answered 6/8/2018
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
6 doctors weighed in across 2 answers
A doctor has provided 1 answer
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