Sir my nose is always block. I take to medicine...

When there is a loss of smell, a rise in temperature, shortness of breath, diarrhea, cough and a sore throat, it is necessary to isolate yourself at home and contact the competent medical authorities to rule out infection with Corona

How to treat stuffy nose

it may be caused by sinusitis which is treated by amoxicillin and to relieve nasal congestion you can use nasal drops like naphazoline and you should not use it for more then 1 week and nasal polyps should be excluded and if present then ot should be treated by budesonide nasal spray and if no improvement occurs then it can be removed by surgery or endoscopy and the cause may be allergic rhinitis which is treated by loratidine and naphazoline  and avoidance of the cause of allergy 

How to diagnose stuffy nose

you should be examined by ENT doctor to examine the nose and head MRI or CT can be done to diagnose sinusitis or nasal polyps

what are the causes of stuffy nose

sinusitis
allergic rhinitis
nasal polyps
deviated nasal septum

what are the associating symptoms of stuffy nose

nasal discharge
bad smell in the nose
cough
headache

advise

follow up with the ENT doctor to do the investigations and provide the treatment