Signs and symptoms of calciphylaxis include: 
Large purple net-like patterns on skin
Deep, very painful lumps that ulcerate creating open sores with black-brown crust that fails to heal — typically in skin areas with high fat content, such as the stomach and thigh, although they can occur anywhere
Infections from wounds that don't heal
 Causes The exact cause of calciphylaxis is unknown, but recent studies have revealed that most people with the condition have abnormalities in blood-clotting factors. Blood-clotting factors are substances in your blood that help stop bleeding. These abnormalities can lead to small blood clots forming more often than they normally would. In addition, people with calciphylaxis have an imbalance in the metabolism of calcium. This causes calcium to be deposited in the smallest parts of the arteries (arterioles), which eventually leads to the formation of blood clots in the arterioles. Blood clots can cause fat tissues and skin to be deprived of oxygen and nourishment.