As a medical professional, I can tell you that high blood potassium levels, known as hyperkalemia, can be caused by several factors. It's important to note that not all cases of reported high potassium are due to true hyperkalemia. Sometimes, the high levels can be a result of the breakdown of blood cells in the sample, which can happen during or shortly after the blood draw. When it comes to genuine hyperkalemia, the most common cause is related to kidney function. Here are some key causes: 1. Acute kidney failure: When the kidneys are unable to properly filter out potassium from the blood. 2. Chronic kidney disease: Over time, this can also lead to an inability to regulate potassium levels effectively. 3. Medication use: Certain medications, such as potassium-sparing diuretics, ACE inhibitors, and some blood pressure medications, can contribute to high potassium levels. 4. **Potassium supplements or salt substitutes**: Overuse of these can lead to hyperkalemia. 5. High potassium diet: Consuming a diet rich in potassium-rich foods can also contribute, especially if kidney function is impaired. 6. Adrenal or thyroid dysfunction: These conditions can affect potassium regulation. It's crucial to consult with a healthcare provider for an accurate diagnosis and appropriate treatment if high potassium levels are suspected. read more >>

Often a report of high blood potassium isn't true hyperkalemia. Instead, it may be caused by the rupture of blood cells in the blood sample during or shortly after the blood draw. ... The most common cause of genuinely high potassium (hyperkalemia) is related to your kidneys, such as: Acute kidney failure.read more >>