A chronic cough is generally defined as a cough that lasts for an extended period and does not improve as expected. It may be dry, hacking, productive, or worse at certain times of day. Some patients notice a cough mainly at night, while others cough during talking, exercise, exposure to cold air, or after respiratory infections.
Because chronic cough can have more than one cause, a thorough evaluation is often necessary. Treating the symptom without identifying the reason behind it may lead to only temporary relief.