Your symptoms are classical of Allergic Rhinitis (nose allergy). It is a condition where your body is over sensitive to certain irritants in the environment. It may be anything from dust to flower pollen. Thankfully it is an easily treatable condition.
Next Steps
People with suspected Allergic Rhinitis need to undergo blood tests to ascertain level of immunoglobulins, CT scan of nose and sinuses and allergy test, of course under the guidance of a doctor and after clinical examination.
Health Tips
Avoid any known allergens, use a mask when out in dusty environment.