Hello doctor my name is Rupesh.i have problems in...

Causes of lossing smelling sensation ?
1. nasal congestion and nasal polyps 
2. nerve injuries 
3. congenital abnormalties ( not expected ) 
What to do next :
1. consult an ENT doctor soon
2. do the following tests :
- physical examination 
- nasal endoscopy 
- biopsy may be needed
- brain MRI may be needed as well  
What are the treatment options ?
1. train your smelling ability ( its done by smelling 4 types of condiments daily )
2. steroidal nasal sprays may help