The mnemonic
Scale, Spot, Trauma
What each word stands for
- ScaleCandle-grease sign: scraping gives silvery scales
- SpotAuspitz sign: pinpoint bleeding on removing scale
- TraumaKoebner phenomenon: new lesions at injured sites
Why it matters clinically
These bedside signs separate psoriasis from other scaly plaques.
Where it stops being reliable
Does not cover nail pitting or joint disease.
Teaching aid, still awaiting independent review. Confirm facts in a standard source.