If the patient has dizziness and weakness in the middle of the night: 1. Consider disorders of water-electrolyte acid-base balance, especially in hypokalemia and hyponatremia, with the above-mentioned typical symptoms, which are most common in hypokalemia. 2. If the patient has infections, after bacteria, viruses or other atypical pathogens have infected the body, the clinical symptoms of increased body temperature, body aches and pains, and weakness in the middle of the night may also occur, especially If the patient has other endocrine metabolic diseases, such as hypothyroidism and hypoadrenocorticism, he or she may also experience dizziness and weakness at night. 4. If the patient has increased sweating caused by various factors, the patient has ionic disorders, or gastroenteritis, nausea, or vomiting more often, resulting in insufficient blood volume, there will also be symptoms of dizziness and weakness in the middle of the night.