What are these red marks and sores on my skin?

These are very explicit photos of Purpura and Necrosis.
Please know that NOT all patients will experience these symptoms.

People with cryoglobulinemia may or may not experience skin rashes.
When symptoms are present, sometimes they include a particular rash called purpura that looks like red spots or purple bruises, usually over your lower legs.
Necrosis occurs when purpura is not treated effectively.