What causes elevated blood urea nitrogen (BUN)?

Under normal circumstances, elevated blood urea nitrogen (BUN) levels may be caused by improper diet, medication use, hyperthyroidism, kidney stones, nephritis, or other reasons. It is recommended to seek medical attention promptly, identify the underlying cause, and receive appropriate treatment. Specific analyses are as follows:

1. Improper Diet

Regular consumption of high-protein foods such as eggs, animal organs, and sea cucumbers can increase the burden on the kidneys, leading to elevated BUN levels. This may also cause symptoms such as diarrhea and bloating. It is recommended to adjust the dietary structure by reducing intake of high-protein foods and choosing low-protein options such as wax gourd, celery, and apples.

2. Medication Factors

Certain antibiotics may impair kidney function, resulting in increased BUN levels. This may be accompanied by allergic reactions, redness, swelling, or other discomforts. It is advisable to consult a doctor promptly to adjust the dosage or switch to alternative medications.

3. Hyperthyroidism

This condition may result from poor diet, causing excessive secretion of thyroid hormones, which accelerates protein breakdown and leads to elevated BUN. Additional symptoms may include weight loss and excessive sweating. Under medical supervision, medications such as propylthiouracil tablets, methimazole tablets, or carbimazole tablets may be used for treatment.

4. Kidney Stones

Metabolic abnormalities may lead to kidney stones, which obstruct urine flow and cause elevated BUN levels. Symptoms may also include painful urination and abdominal pain. If necessary, surgical treatments such as extracorporeal shock wave lithotripsy, percutaneous nephrolithotomy, or open surgery should be performed under a doctor's care.

5. Nephritis

Nephritis is usually caused by bacterial infection. Inflammation reduces the glomerular filtration rate, decreasing urea nitrogen excretion and leading to elevated levels. Symptoms may include painful urination and frequent urination. Under medical guidance, medications such as Sanjin tablets, Huangkui capsules, or Nephritis Recovery tablets may be used for treatment.

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