Arm pain: Since the arm pain is aggravated by stretching the arm, a muscular strain or mild inflammation could be the cause. The small lump, especially if not in the armpit and without tenderness may not be related. A physician would have to examine your arm and lump for diagnosis and advice.
Answered 1/5/2019
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
4 doctors weighed in across 2 answers
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