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.
Some common causes of chronic cough include asthma, allergic rhinitis, sinus problems (for example sinus infection), and esophageal reflux of stomach contents. On rare occasions, chronic cough may be the result of aspiration of foreign objects into the lungs (usually in children).