夜晚先勁咳, how about if you lying down ley? or sleep? Do you have "tam" gar? -> if keep coughing after sleep & no tam, try a very simple method a Chinese doctor told my hubby ar - several friends kept coughing for long period, recovered within 1 week treatment ar
If you would like to try, ask minnie/yourself to me.
NB: I can't access BK during office hr, as blocked already :(