My spit color is change from last some months. Since February... I have done some tests but they all came out to be normal except my Hemoglobin was high 19 and my red blood cells were little high.. I have again done blood test and hemoglobin is down to 17.5 and red blood cells are normal...But I still notice brown color when I spit 4 or 5 times continously... It came out to be white in first or second time but when I spit continously then the color get changed in 4th or 5th time... I use to have tonsils problem as well but I am not sure if this related to tonsils.. I hope there is nothing serious.