A more common nasal-related effect of COVID is the loss of the sense of smell. Some medications, such as birth control or blood pressure drugs, can cause post-nasal drip as a side effect.

Post-nasal drip occurs when excess mucus accumulates in the back of the throat or nose, primarily due to allergies, infections, or irritants. Symptoms include throat clearing and coughing.

Larger polyps can lead to breathing problems, a loss of taste or smell, and infections. Symptoms include a post-nasal drip, stuffiness, sinus pressure, facial pain, and frequent nosebleeds.