Hello!
I wanted to give you my experience....
After surgery, I couldn't hear very well out of my right ear, the muffled sound. I was told it was due to the surgery and the ear couldn't drain properly due to the swelling. Before rad txs they said they could place a tube to help the draining in the meantime but I opted out because I was about the start and didn't want the tx to effect the healing of the hole. Both times that I have gotten sick with a cold, my ear would start to cause me the same problem and it would take about a month to get better but never the same. So this last appt I mentioned it again and sure enough, I had fluid behind my eardrum. I got a tube placed and now my hearing is good as new. I got cisplatin with chemo and I don't believe it is the chemo especially since the muffled ear sound was prior to me even starting. Hope that helps!