Overview

The common cold is a viral infection of your nose and throat (upper respiratory tract). It's usually harmless, although it might not feel that way. Many types of viruses can cause a common cold.

Healthy adults can expect to have two or three colds each year. Infants and young children may have even more frequent colds.

Most people recover from a common cold in a week or 10 days. Symptoms might last longer in people who smoke. Generally, you don't need medical attention for a common cold. However, if symptoms don't improve or if they get worse, see your doctor.