Protein disorders causing bruising or bleeding

[Renato]

Conditions that cause an abnormal protein or an abnormal amount of certain normal proteins in the blood can cause blood vessels to become fragile. When these fragile blood vessels break, people develop red or purple blemishes or bruises (purpura) on the skin. Conditions that may cause purpura include

Amyloidosis
Cryoglobulinemia
Hypergammaglobulinemic purpura
Hyperviscosity syndrome