What are the symptoms of the Blue Rubber Bleb Nevus Syndrome?

The main symptom of blue rubber bleb nevus syndrome (BRBNS) are the blue skin lesions or blebs that appear on the skin. These tumors larger than 5mm around, are not cancerous. They are accompanied by pale skin and fatigue. BRBNS can cause bleeding in the GI tract, and in those cases, bloody stools can also be a symptom.