Diseases

• Amyloidosis

• Cancer (lymphoma, leukemia, or various solid tumors)

• Diabetes mellitus*

• Some glomerulonephritis (including rapidly progressive glomerulonephritis caused by streptococcal or staphylococcal infection)

• Obesity*

• Preeclampsia (also called toxemia of pregnancy)

• Protozoal infections (usually schistosomiasis or malaria)

• Systemic lupus erythematosus (lupus)*

• Vasculitic disorders (immunoglobulin A vasculitis , granulomatosis with polyangiitis, or microscopic polyangiitis)

• Viral infections (particularly hepatitis B,* hepatitis C,* or human immunodeficiency virus [HIV]*)

Medications or illicit drugs

• Gold

• Heroin taken intravenously

• Nonsteroidal anti-inflammatory drugs (NSAIDs)*

Allergies

• Insect bites

• Pollens

• Poison ivy and poison oak