I had ear bother for a while which (IIRC) was a sort of a mixture of an infection and an eczema like reaction. A kind of vicious circle- the infection caused irritation which cause eczema that was prone to infection repeat to fade. Made me pretty ill at times – deafness, pain behind the eyes, occasionally unable to move my jaw to eat – and dogged me on and off for over a year. A kind of squelching, seemingly wet but not actually wet sensation was often part of the onset.
Its sometimes referred to as ‘Swimmers Ear’ and prevention involves trying not get water into your outer ear (when washing /showering etc) and avoiding your ears staying wet if water does get in there. Water trapped in your ear isn’t whats happening and not the cause of the sensation you feel, but water getting in there can be the cause.
Treatment was an ear drop mixture of antibiotics and hydrocortisone, and occasionally trips to outpatients to have the inside of my head hoovered.