... 11 years and shortly after starting it experienced itching followed by sores which start small and get bigger because of my scratching. I saw a dermatologist who diagnosed me with prurigo nodularis. I am convinced it is caused by one of my medicines. I have so many scars (white spots) from this that I can't even wear short sleeves in public. I am so embarrassed by how I look. For some reason they never develop on my stomach or lower back. Wondering if anyone else has experienced this.