I have post-concussion with ear ringing and elevated heart rate etc. I have been taking fish oil that I think helps with chest pains I had for awhile. The ear ringing has been driving me crazy and I decided that I try nettle tea. So I did drink a whole pot of it yesterday. I do take some magnesium time to time when my heart bugs me. (btw I have no heart issues, it's all from the head trauma) I am happy to report that the nettle tea did help. I try not to take anything at once. So I wait about an hour or two between supplements. Nettle is great for inflammation, and at the end that is what we have, our brain is swollen so It creates pressure in our head therefore the heart has to pump harder to get blood in it, and that is what we hear as ear ringing. I hope everyone of you guys get better. I am still have symptoms but this is the first day when I can tell the difference.