A cough returning after a recent cold can be due to lingering airway irritation or a new trigger, such as dust or a weather change. Sinarest New tablet may help with cold symptoms, but may not fully control cough. Try warm fluids and steam inhalation, and avoid exposure to dust or cold air. Keep yourself well-rested and hydrated to support recovery. If the cough continues or keeps coming back, consult your doctor for proper evaluation.

Your symptoms suggest chronic sinusitis, possibly with a deviated septum or nasal allergy, which is why you get only temporary relief and depend on sprays. Continue Montelukast + Levocetirizine as prescribed, but avoid overusing nasal decongestant sprays as they can worsen blockage over time. Do regular steam inhalation, saline nasal rinses (like neti or saline spray), and stay away from dust and allergens. Since this has lasted 3 years with one-sided blockage and headache, it?s important to consult an ENT specialist for a detailed check (like nasal endoscopy or CT scan), as you may need long-term treatment or a minor procedure for lasting relief.