Patients with chronic renal failure may exhibit fatigue, which is mainly due to anemia. Patients with stage three or higher chronic renal failure generally have anemia, which can lead to symptoms such as fatigue, palpitations, and pallor. Additionally, patients may experience nausea and vomiting, which are primarily caused by an increase in toxins. Furthermore, patients may also exhibit symptoms such as edema and shortness of breath, as individuals with chronic renal failure typically experience reduced urine output. A higher intake than output over time can lead to an increased circulating blood volume, resulting in heart failure.