Strictly speaking, uremia is not an independent disease and it is not contagious. Uremia refers to the state where numerous causes chronically damage the kidneys over a long period, eventually leading to the destruction of most kidney tissue, resulting in the kidneys' inability to excrete metabolic waste. There are many causes of uremia, including chronic nephritis, diabetes hypertension, systemic lupus erythematosus, urinary system stones, and even prostate hyperplasia, among others, which damage the kidneys and lead to this condition. Generally, these causes are not contagious as they do not involve bacteria, viruses, or fungi. However, if uremia is caused by infectious diseases, such as hepatitis B virus or HIV, these infectious diseases can be contagious, but uremia itself is not contagious.