 [ Symptoms ] how is osteoarthritis diagnosed [ Disease ] go to the doctor if it is a cyst it will need to be removed usually a simple surgery in office because draining it if you are able will only fill back up the doctor will most likely prescribe antibiotics to help deal with the infection it can affect his sinuses his vision and even cause dental pain but a doctor is definitely needed if it is that large i would imagine it is causing him distress in social situations as well