you seem to be suffering from Acute nasal vestibulitis which is a boil in the nose resulting from accidental/ forceful removal of nasal hair.
This is a painful and troublesome condition, though not very serious.
You should keep your nose moist; you can use liquid paraffin
for this purpose.
Avoid touching it again and again, and yes, don't remove the scab as it can bleed.
Use an antibiotic ointment.
If problem persists, it needs a systemic antibiotic too. And some anti-inflammatory medicines also.
And if it still troubles you kindly consult an ENT Specialist