7.Decreased Sense of Smell: COVID-19 and other infections.
A COVID-19 infection can cause a decrease in your ability to smell or taste. A bad cold or sinus infection can also cause congestion that makes it tough for you to smell or taste.
8.Decreased Sense of Smell: Diabetes
Doctors don’t know exactly what the link is. High blood sugar may damage nerves, blood vessels, or organs that make up your complex sense of smell. Or it could upset your endocrine system, which could interfere with your sniffer. Learn the signs of diabetes and talk to your doctor about how to manage it or, better yet, prevent it.
