Although you're feeling it around the bicep area instead of the forearm it still sounds like it's tendon trouble (I've had trouble with this predominatly in my weaker arm) and could merely be inflamation, which a cream can resolve. It could also be a small muscle tear, these don't always result in major pain or lack movement.
If it's improving all on it's own then all good & well, otherwise it'd be worthwhile getting it checked out before it gets worse.
Best of luck.
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