What are the symptoms of low potassium levels (hypokalemia)?

The main symptoms of hypokalemia include: 1. Muscular system: muscle pain, weakness; in severe cases, symptoms such as muscle paralysis, rhabdomyolysis, and respiratory failure may occur. 2. Digestive system: gastrointestinal symptoms such as nausea, vomiting, loss of appetite, abdominal distension, and constipation; in severe cases, paralytic intestinal obstruction may develop. 3. Cardiovascular system: arrhythmias, such as palpitations, tachycardia or bradycardia, ventricular premature beats, etc.; severe cases may lead to cardiac arrest. Abnormalities such as U waves and bradycardia may appear on the electrocardiogram (ECG). 4. Nervous system: central nervous system symptoms such as listlessness, delayed reactions, disorientation, drowsiness, or coma. If symptoms persist or worsen, timely medical consultation and examination are recommended.