Hi,Welcome to HCM Virtual Clinic.
I reviewed your query in context of all the facts of your query.
Based on the facts of your query,the lump between your eye and bridge of nose,seems to be lacrimal duct Cyst/or 
Epidermal Inclusion Cyst or Sebaceous Cyst,after the trauma from debris to your face with resolved 
Stye after the debris trauma to face area.
Duration of 4 yrs restricts the lump  cause mostly to Epidermal Inclusion Cyst or Lacrymal duct Cyst.
Dermoid Cyst possibility is ruled out as they exist since birth and more in the middle plane.
Treatmetnt-
Second opinion needed from your ENT/Opthalm and 
General Surgeon,who would treat it accordingly.
USG /Sos CT skull would fix the cause of the painful nose bridge lump as above.
For the cosmetic correction Excision and hpr study by Team of -doctors,for the nose  lump under antibiotic, is suggested under guidance of your Surgeon.
This would help you to plan treatment with your doctor.
Contact with Premium question to ME,if need be.
Will appreciate your Hitting  thanks and writing  excellent review comments to help needy patients like you. 
Welcome with any other further query in this regard.
Good Day!!
Dr.Savaskar,
Senior Surgical Specialist
M.S.Genl-CVTS