Clinical manifestations of high potassium in nephropathy include: cardiovascular system symptoms, neuromuscular symptoms, digestive system symptoms. 1. Cardiovascular system symptoms: elevated potassium inhibits cardiac muscle, which manifests as weak cardiac muscle contraction, slow heartbeat, easy arrhythmia, and even cardiac arrest in severe cases. 2. Neuromuscular symptoms: weakness of limbs, numbness around the mouth, irritability, even consciousness disorder, and in serious cases, it affects respiratory muscles and leads to asphyxia. 3. Digestive system symptoms: hyperkalemia can cause increased release of acetylcholine, nausea, vomiting, abdominal distension and other digestive symptoms. If the patient has chronic renal insufficiency, frequent blood potassium monitoring is needed to avoid life-threatening conditions such as hyperkalemia, and timely consultation should be made when discomfort occurs.