I'm assuming this isn't a cleverly disguised pre-SC post.
Sorry to hear (no pun intended) of your ear issues - I've never come across this (I ended up giving my AirPods away to my youngest as I couldn't find a good fit). Have you had this problem with any other inner-ear headphones (i.e. the cause is specifically the AirPod materials not just having something inserted into your ears)? Although it's interesting that the problem only started after many months of wearing them (maybe the warmer weather / sweat ?).