It can be due to allergic rhinosinusitis along with deviated nasal septum. Yes please don’t sleep directly under the fans or ACs, avoid evrythng that’s cold, to eat and drink. Do steam inhalation’s daily twice and tak à Tab.Montek LC before sleeping for 10 days.
Next Steps
You need to get a blood investigation done to rule out allergic rhinitis
Health Tips
Regular steam inhalation’s, avoiding dusty n cold places should work for you. Along with maintaining clean surrounding too.