Hi, how long have you been wearing aids?
-If new, this may be somewhat normal, but it depends on quite a few things. I don’t wear domes but am no stranger to ear irritation from hearing aids. You should be able to tell if they are just too big, you shouldn’t be having to really cram anything in. There are many dome options.
-There’s a lot of chance with a variety of types of ear infections that can feel just like tender/irritated canals. Is it possible its a mild infection? If you’re new to hearing aids you may not know the difference. Its possible you have a mild infection and swelling from sticking fingers in your ear so much recently.
-I’m not a medical doctor or anything but I many times have used Neosporin plain (make sure not to get like the pain relief or medicated versions at all) if I was having canal pains. If I knew it was an outer ear infection and needed attention but sometimes I had to go to work without an option so I would lube up my canal and mold and just get it in and struggle through the day. On bad days I would bring qtips for light cleaning and the neosporin to reapply. As soon as getting off work I would be cleaning the canal lightly of the Neosporin with qtip and dry with alcohol(very painful, maybe skip this step but I did), letting it dry and applying prescribed antibiotic drops and be gone within a week, wearing aids as little as possible while treating. Either case, the Neosporin has never been an issue for me as a lubricant, infection or not.