It could be because of dry weather or early symptoms of sinusitis. You can use solspre nasal spray 2 sprays in each nostril thrice daily for 3 days. Steam inhalation twice daily would also help.
Next Steps
If no improvement or new symptoms appear, you would need an offine consult and Nasal Endoscopy
Health Tips
Avoid exposure to cold air/dust.Avoid taking cold drinks. Avoid AC as much as possible. Avoid picking the nose. Stay hydrated-Drink plenty of water