What will happen to vein occlusion due to Radiesse nose injection?

Injection of Radiesse into the nose or forehead is a well known "danger zone" for reasons that you have already discovered.  This problem will either lead to gradual resolution, or less commonly to skin necrosis.  I will generally pre-inject the treatment sites with Lidocaine 1% with 1:100,00 epinephrine in order to minimize chances of this complication.

Time will tell. One additional medication that it is often used for this type of problem is nitro paste. This leads to vein dilation and can sometimes improve these symptoms. Otherwise, keep the area moist and watch for signs of infection (redness, drainage, swelling, fever) and keep in touch with your doctor. I hope this information is helpful.Stephen Weber MD, FACSWeber Facial Plastic Surgery

Although I have never experienced this dreaded complication, the area around the nose is known danger area and fillers placed here may result in vascular compromise.  It sounds as if you may have had intravascular injection, or more commonly, vascular compression from your Radiesse treatment.  If this was arterial compromise you would not likely see the symptoms you describe so you are probably dealing with a venous occlusion and will have resolution of your symptoms without any long term sequelae.