Even if you've been coughing for a while, coughing could be a symptom of some other condition. If cough persists for over 8-weeks, it is considered chronic and typically is not associated with a cold. Knowing the cause is the first step to Chronic Cough Treatment ; treatment varies depending on the cause of the cough. After months of not finding relief from a cough with over-the-counter medicines, patients often come to ENT & Allergy Specialists of Florida and ask, “Why can't I find relief from my cough with an OTC medicine?” Most frequent causes of an ongoing cough. There are many possible causes of chronic cough, and it's important to be able to find out the cause. One of the more familiar causes of these is Postnasal Drip (PND), which is the drainage of nasal mucus into the back of the throat, leading to frequent coughing (particularly at night). Alternatively, it can be due to acid reflux; stomach acids can burn the throat and airway without giving the sensa...