I have been suffering bad odor from scalp for so long that I gave up and thought it was just because I had thick kinky hair and I mean years like 20. So anyways I gave up on trying to fix that . So about a year ago I started to get whiff of what I thought was bad breath so long story short it turned out to be a sinus infection and thanks to someone on this site it was cured just this week but the funny thing about it is that the bad scalp odor is also gone and I just realized it yesterday . I am very happy now killed 2 birds with one stone and those little stones just happened to be something called is erythromycin. I went to the doctor told her I had a sinus infection , and requested her to prescribe some erythromycin .2 days later bad odor from nose (sinuses) was gone and also gone was bad scalp odor . So I would like to thank this site.