Nose block probably because of some allergy .
relate the nose block with environmental factors like dust/ pollen/ cold weather/ cooler/ Ac,
Or some food items/ may be shampoo/ soap / deordarant
Next Steps
sip lukewarm water with lemon
saline water gargles 3-4 times a day
Health Tips
hydrate with plenty of fluids
clean bowels ,take high fibre diet