Long term use of otrivin nasal drops, which is nasal decongestant can further worsen your nose block, a condition called rhinitis medicamentosa. You have to consult an ENT specialist who'll assess your nose for any structural causes of obstruction. If there is sufficient space in your nose, then steroid nasal spray would help to improve the condition which would be prescribed by your doctor.

You should not stop otrivin use directly reduce its dose first for a month take paediatric dosage daily And then use it on alternate days

You need to stop using otrivin drops, u have to start steroid nasal spray and you might need surgery as a next step if nasal spray is not useful

Frequent use of otrivin may cause rhinitis medicametosa. Stop otrivin. You can use saline nasal drops and steam inhalation.

Yes, you shouldn’t use otrivin for more than 5days It’s better you visit a doc and get examined physically Need to examine for the patency of nasal cavity

You should consult online through Practo more detail is required