For the last couple of months I've been increasingly aware of a whistling noise in both ears, especially in the absence of other background noise.
Online research (always dangerous!) turns up some possible links to aspirin, which I've been on for 14 years, but probably not linked in low doses and also to interferon, which I've been on for 18 months, but not as a common side effect.
Has anyone else on here with ET experienced problems with tinnitus and identified a cause? I'll raise it at my next clinic appointment in a few weeks but I'm guessing it may just be another sign of getting older..!