I switched to an all natural deodorant about a month ago (native), and now have swollen lymph nodes in both armpits that are painful. i know this has ?

Stop it: If you suspect that the natural product has caused it, you will need to stop using it. Remember that not everything natural is good for you. For example, poison ivy/oak is likely as organic and natural as it comes (since no one tries to cultivate them or fertilize them with chemicals), yet it sensitizes over 90% of the people having direct contact with it.