Hello doc, my mother is having some throat problem from last 8-9 days, she feels like she have something thread like in her throat, however there is No pain , she is able to eat everything, She has a chronic cough because she is a smoker since last 20 years, we have taken antibiotics aziomythcin for 5 days , she still feels thread like something in throat which is very irritation, what to do, what is the cause?