Surgical patients, and especially bariatric patients, are high-risk patients who may develop thirst due to intubation, blood loss, osmotic imbalance, and prolonged fasting. Nurses often have the perception that when the patient's oral intake is turned off, nothing can be done to prevent thirst and dry mouth. Thirst is one of the main stress factors that reduces the comfort of intensive care patients. So far, no assessment has been routinely used to assess thirst and dry mouth. However, thirst is a mitigable symptom that should be evaluated by the nurse.

The data were collected by the researcher by face-to-face interview technique between April 2022 and March 2023 in the groups participating in the study. It was applied to patients who agreed to participate by giving information about the purpose of the study to patients who met the research criteria. The patients were divided into 2 groups as study and control. In the study group, the intensive care oral care frequency assessment scale was applied to 55 patients at the end of the 16th hour, in addition to the assessment of pain and thirst at the 1st, 4th, 8th, and 16th hours postoperatively. It was applied to patients with a thirst of 3 and above by spraying cold water into the mouth of the patient every hour. The standard oral care of the clinic was applied to the patients who needed oral care. In the control group, standard nursing care was applied to 55 patients with the pain, thirst and intensive care oral care frequency assessment scale at the 1st, 4th, 8th, and 16th hours postoperatively.

Inclusion Criteria:

• be between the ages of 18-65, Level of consciousness (level A of AVPU) and orientation (place, direction, time) swallowing and coughing reflex without nausea-vomiting No mandible fracture No dialysis treatment When we ask about their thirst, those who have 3 or more thirst on a scale of 0-10 hungry for more than 6 hours Anesthesia duration exceeding 1 hour Patients not receiving Mechanical Ventilator support undergoing elective surgery Individuals who can communicate at a level that can answer the research questions will be included.

Those who do not use dentures

Exclusion Criteria:

• be over 65, under 18 Having lesions on the oral mucosa and lips Having any disease that prevents communication such as Alzheimer's, dementia Patients with a thirst feeling of 3 or less during the cold spray application