Hello , the fact that your lymphnodes
are painless means that it is not an acute inflammation. The inflammation should have been happening for a relatively longer time. Though I am unable to infer Whether the lymph node enlargement is significant (a size as small as a pea can be insignificant ) it is worth investigating due to the itchiness you have been having for long. The external ear canal
might have to be looked into by an ENT physician. A possibility of ear canal infection, mostly a chronic one has to be considered. Though it is not an emergency I would suggest you to meet your physician earlier especially if you have coexisting conditions that might suppress your immunity, say diabetes
. If it pains a lot too, better see the doctor earlier to get a relief. Hope you get better soon. Take care!