I have burning pain in my left armpit for 2 weeks now. Had an ultrasound of breast which showed enlarged lymph nodes in both armpits and one cyst in one breast - doctor said that cannot be cause of burning. Wondering why there is burning - had some small redness/irritation on the same armpit 3 weeks earlier as a reaction to some perfume but that has got better. No burning on right armpit. Any solutions here as no visible patch there.