Around 5 years ago, my mother diagnosed tb, but on this time doctor can't find tb easily. Because all the tb report is ok. Even the x ray can't find tb symptoms. On this time my mother spit with blood all the day at regular intervals. Sometimes more blood come from mouth. When she spit. She told their throat may irritated. And their condition was very serious on this time. After various changed of doctors. They told us it's tb and you can take tb medicine. And after some months my mother condition normal. And now the symptoms is back. And when she spit then come blood from their mouth. Sometimes. Then I checked up with the doctor. They told it's not tb it is normal. They advised x-ray and x-ray is normal. And my mother told us every time their throat may irritated sometimes when blood come from month. What can I do. I am very helpless. Please guide me. 5 years ago the doctor who check up my mother was died. Please help me.