irishsquid
Contributor
I have this same problem, however; it occurs very infrequently. I have had tinnitus since the age of 20. Neither are a problem to me. My wife thinks the tinnitus is an excuse to ignore her....
This is the closest I've seen that describes my symptoms is "ear drum twitch--HELP!!": Cold and Flu Exchange - Support Group.
One med board named something called "tensor tympani muscle spasm", but further research seems to rule that out as I have zero sensitivity to loud noise nor is there a popping sound.
The "fluttering" is not painful or discomforting. It has not occured while diving or swimming, it's usually afterward and I just ignore it. When it stops, it's one of those pleasant feelings (like a Q-tip in the ear, after a shower) I have noticed it occurs more from cold water, almost like maybe the warming up after the dive is releasing "tension" from the eardrum.