You appear to have 'Allergic Rhinitis'
It is an allergic response to various agents, commonly smoke, dust, strong odours, certain foods.
It presents with running nose, itching, sneezing, nose block and sometimes even loss of smell
Next Steps
You need an ENT evaluation to start your medication. A comprehensive allergic profile helps to detect the substances you are allergic to.
Health Tips
Try and use a mask as far as possible. It is readily available at chemist shops. Once treatment starts, you will get relief.