A common ailment in intensive care units (ICUs), hypernatremia presents serious hazards to the physiological balance of patients and can sharply increase the death rate of critically ill patients. To determine if the cause of this electrolyte imbalance is an excess of sodium consumption or a lack of free water availability, a thorough clinical evaluation and urine electrolyte testing are frequently required. Careful monitoring of salt-to-water ratios becomes crucial in the complicated setting of intensive care units (ICUs), where patients may suffer from cognitive deficits that compromise natural physiological mechanisms such as thirst management. In order to properly treat hypernatremia, healthcare professionals—especially intensivists—play a crucial role in assuring watchful surveillance and prompt action. Treatment strategies typically involve the administration of free water and/or diuretics to enhance salt excretion, with correction rates carefully tailored to the individual patient's condition to mitigate risks such as cerebral edema. This multifaceted approach to managing hypernatremia underscores the importance of a coordinated and interdisciplinary effort in ICUs to optimize patient care and outcomes while minimizing potential complications associated with electrolyte disturbances.