See a doctor: Any unexplained mass needs professional evaluation. Most are not serious, but serious infection and cancer both are possible. Cancer is rare at your age, but among the rare cancers, at your age bone cancer is among the more common ones. Get it checked out soon. Good luck!
Answered 5/1/2019
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4 doctors weighed in across 2 answers
4 doctors weighed in across 2 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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