I recently developed a quite serious case of this, following illness and ear surgery. The sound is like a cross between the noise when you're on a plane and a lorry engine. It's quite loud most of the time.
I am losing sleep and it also affects my balance and my bike handling. It's dead annoying too.
Any advice ?
I've had it for 25 years now- avery high pitch whistling in my right ear as well as a sensitivity to loud noises-eg car alarms, dogs barking etc. You do -eventually -get used to it as the brain has an amazing ability to 'adapt' to change and filter out non threatening stimuli. you need to get 'friendly' with it first tho.