I quit smoking 8 months ago yet i still cough. i do live with smokers, is this why i cough? i finds my throat dry n scratchy. i'm not sick what is it

Persistent inflammation: Although you quit 8 months ago, you still have persistent inflammation from years of smoking. In addition ongoing exposure to secondhand smoke is a problem. You should try to avoid this. It may take more time to improve. But you are doing yourself a big favor and helping avoid complications from long-term smoking such as lung disease and cancer. See a doctor if cough or throat irritation persists.