Thanks for the links John. I will have a look at them. I mostly notice the tinnitus when I'm resting or sleeping. If I'm around people I don't notice it at all. I'm aware of it the most when it's quiet and I'm relaxing at home. It seems to vary in loudness and there are occasions when I can barely hear it. I wish I knew what triggered it. I'm staying away from stimulants like tea and coffee that contain caffeine, because they are believed to make it worse, and although I don't normally drink alcohol I noticed it seemed quite bad after drinking gin! I'm not drinking any at the moment. I had both humming and whining noises in my ears many years ago when I was doing shift work, but these went away after a while. It was very disturbing while it lasted though. I'm hoping what I'm experiencing at the moment will pass, but I don't know how long it will take. Hopefully it's not here to stay!