Patient : When i run or workout that involve my hands moving my armpits develop this foam and i dont know where it comes from. ive tried not using deoderant for that day then work out but its still there.
This definitely can be caused from excessive movement of your arms. When you use your arms in a running motion, the sweat created could turn foamy as the sweat contains minerals, lactate and urea. I would try and go see a Dermatologist who maybe able to help you out with some medicated deodrants. Good luck with your running and workouts.
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