Hiccups and Acute Symptomatic Hyponatremia: A Rare Manifestation of COVID-19

We report a rare case of a patient presenting with a very unusual manifestation of coronavirus disease 2019 (COVID-19). A 62-year-old male presented to the emergency department (ED) with complaints of headache, nausea, vomiting, and intractable hiccups for two days. Laboratory results showed that he had profound hyponatremia (Na+: 103 mEq/L) and hypokalemia (K+: 2.3 mEq/L) with a positive RT-PCR for COVID-19. He was treated with an intravenous (IV) bolus of 3% saline solution followed by continuous infusion. The patient was discharged after eight days when his electrolytes returned to normal, and a significant symptomatic relief was achieved.