What are the possible causes for the loss of smell, and how can factors such as illness, injury, or environmental influences contribute to this condition?

There are multiple types of loss of smell:

• Anosmia - Total loss of smell

• Dysosmia - Distorted sense of smell

• Hyposmia - Reduced ability to smell

The potential causes for a loss of smell include:

• Infections (especially COVID-19)

• Injury

• Allergies

• Zinc deficiency