Clinically, hypokalemia can lead to muscle weakness, heart involvement, etc. Hyponatremia can lead to nausea, vomiting and headache. When the human body lacks sodium and potassium ions, it is very harmful to the human body and needs timely treatment. 1. Hypokalemia: the earliest clinical manifestation is muscle weakness, there may also be flaccid paralysis, decreased or lost tendon reflexes. Patients have anorexia, nausea, vomiting and abdominal distension and other intestinal paralysis manifestations. Hypokalemia can jeopardize the heart with sinus tachycardia, conduction block and rhythm abnormalities, and in severe cases, ventricular tachycardia and atrial fibrillation. 2. Hyponatremia: clinically, it usually manifests as limb weakness, nausea, vomiting, headache, painful muscle spasm, neuropsychiatric symptoms and reversible ataxia. Since sodium ion is the main substance to maintain the osmotic pressure of extracellular liquid crystals, when low sodium occurs in the organism, it is often accompanied by symptoms of dehydration, which can cause circulatory disorders and cerebral edema in severe cases. When potassium and sodium ions are low in the body, you should go to the hospital in time.