From very long time, I am noticing my mother that she is constantly coughing . At first I thought it might be because of weather change or eating cold stuff. But later when it didn't stop. And she coughs very badly and said that whenever she coughs , she so bad that that even I feels that this cough is not normal but actually comes from lungs..like it shakes her lungs and she feels roughness in her throat. I think that it might be because of using red paste (powdered) which is actually not worthy to use coz.. it is not good for health. Upon my opinion, she stopped using it from some time..but it still not working. What to do? How to know what the actual problem is? How to cure it, or do I need to take her to any nearby doctor if it is serious? One more thing, she said that whenever she eats something sweet she starts coughing . Or eating any packed stuff also leads to coughing. Some people say it's because of theroid...please let me know what the actual causes and problem is..