Symptoms that are not easily seen in chronic renal failure include hemoptysis, diarrhea, blood in stool, headache, loss of consciousness, incontinence, and so on. In fact, this is a very difficult question to answer, simply put, except for the more common symptoms of chronic renal failure are not easy to appear. The main symptoms of chronic renal failure are impaired excretion of toxins and water as well as partial endocrine dysfunction, so the more common symptoms include nausea, vomiting, edema, elevated blood pressure, anemia, itchy skin, chest tightness, breathlessness, and paroxysmal dyspnea at night. Other than that, other symptoms are rare in patients with chronic renal failure. Chronic renal failure usually does not cause blood vessels in the lungs to rupture, so hemoptysis is rare; and in patients with chronic renal failure, these symptoms are rare unless there is an excessive increase in blood pressure that leads to brain hemorrhage and causes headache or loss of consciousness.