What symptoms suggest calciphylaxis?

Calciphylaxis. An electrolyte disturbance noted at dialysis with peturbation in calcium and phosphate may indicate incipient problems. However, clinically, calciphylaxis is marked by irregular patches of dark purple/black eschars on the skin. These patches are tender. Additionally, the superficial veins may be dark (indicating thrombus inside the vessel).
Calciphylaxis. In end stage renal patients, purple violet skin lesions that slowly become necrotic. They are very very painful.