Yes. Everybody's ears ring and hiss in all kinds of ways, but brains learn to tune it out. Sudden changes in the acoustics sometimes cause that to fail. Could be infections or trauma or chronic fatigue damage that causes it. Mostly it goes away, but if it's bad enough it might not.

I wouldn't be surprised that it you're just on the edge, even blood flow or muscle tension might push it towards on/off.

I'm sure that can change the aspect, but it is hearing damage as the underlying cause. Often loud workplaces, heavy machinery, but can also be audio toxic drugs, and viral.