Eardrum blister: The eardrum is covered with a thin layer of epithelium, which makes it a lot like very very thin skin. As such, the things that can cause blisters on skin can affect the ear drum and things that might be irritating to the skin can cause blistering on the drum. Here are a few things that can do it: trauma, viral infection, bacterial infection, foreign body, persistent wetness of the ear canal.
Answered 3/27/2018
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