Causes and mechanisms of colds
What causes colds?
Colds are usually caused by viral infections. One of the major symptoms of a cold is nasal congestion, which can also be the result of several other causes.1 Here we take a closer look at the causes of colds and their mechanisms.
1- Viral infection
Common cold and influenza
Pollens, animal dander, certain foods, insect venom, latex and various medicines.
3. Inhaled irritants/pollutants
Gases, metals, organic chemicals and biological material surrounding a carbon core.
4. Structural abnormalities
Septal deviation, concha bullosa and adenoid hypertrophy