you may consider using zinc oxide on your nose to prevent any further damage to the skin of that area. many beach life-guards have to resort to using this white barrier because they have not found any other way to protect their nose especially from the damaging rays of the sun. you're very astute to recognize that it is dangerous to continue to expose your already red nose to further uv radiation.
how can i protect my nose from getting red and sunburned when i work outdoors?