It can be a cyst inside nose, nasal polyp or benign growth inside the nose. Small polyps may not produce symptoms and may be identified only after examination. Symptom-producing polyps can cause nasal airway obstruction, postnasal drainage, dull headaches, snoring, and rhinorrhea.
To confirm the diagnosis, an evaluation from an ENT specialist is required.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.