Uremic patients without hyperkalemia can eat tomatoes, but if combined with hyperkalemia eating tomatoes must pay attention to the amount. Patients with uremia are unable to excrete various toxins and excess water from their bodies due to the reduced glomerular filtration rate. If you have hyperkalemia, you need to pay attention to eating less food with high potassium and not to consume too much water. Tomatoes are high in potassium, containing 150-300mg of potassium per 100g of tomatoes, especially cherry tomatoes, which are high in potassium, and they are also high in water. Patients who consume too many tomatoes are prone to hyperkalemia, which can lead to fatal arrhythmias in severe cases, as well as to increased edema, which can lead to heart failure in severe cases. In conclusion, patients with uremia combined with hyperkalemia should pay attention to limit the consumption of tomatoes appropriately.