There are differences that relate to the techniques used in cooking. A thin copper pan is great for melting butter or chocolate straight on the burner. Modern air-gap wall stainless steel pans hold the heat better and work better for simmering or boiling. Copper is harder to upkeep. Pans will develop hot spots, even copper which is the better conductor.
Common causes of chronic cough include: 1  Postnasal drip â This is a sensation of mucus trickling from the back of your nose down into your throat. It may be due to hay fever, allergies or irritants. 2  Asthma â While unusual, asthma can present with only a cough. This is known as cough variant asthma.
A cough that has lasted for between three and eight weeks is termed a âsub-acute cough.â And coughing that has been going on for more than eight weeks is termed a âchronic coughâ. While some people have been coughing for years, the cause of a cough can be determined in at least 90% of these cases. 1  Therapies for a cough have a success rate of at least 85%, and therefore, treatments should be aimed at the underlying cause, rather than just medications that cover up a cough temporarily.