Hello dear,
After going through your history, I believe you have some genuine concern and I will try to help you out of this situation.
The condition you are facing is called
Dermoid ( Nasal dermoid) which is a congenital ( since birth)condition and flares up in due course. In simple term it is like a bag of tissue originating from skin buried deep to the skin and they give rise to new skin and hairs which normally remain silent, but painful when gets infected. If you can remember, there must be a black spot in it like we have pimple head. That is the mouth of it which discharges when infected.
Generally they do not extend deep, but very rarely ( I said very rarely) it may extend to the brain. You are fortunate that in your case it is limited to the
nasal bone. The treatment of this situation is to remove the complete bag of tissue. if a tiny remnant remain inside the skin after the surgery, in some time it will enlarge again.
For patient like you, I advise antibiotics till the swelling subsides and then ask them for a complete clearance surgery. Complete clearance is the only option in your case.
I hope I could solve your query. Please do not hesitate to clarify more doubts for the same situation.
Thank you for the way you are in my life.
Dr Ipsit Panda