The aim of this study is to examine the effect of hot water foot bath applied before pituitary adenoma surgery on anxiety level and physiological parameters. The main hypotheses are: * H1: Foot bath applied before surgery reduces the state anxiety level of patients. * H01: There is no difference between the preoperative mean arterial pressure of the patients in the foot bath applied study group and the control group. * H02: There is no difference between the preoperative heart rate of the patients in the foot bath applied study group and the control group. * H03: There is no difference between the preoperative respiratory rates of the patients in the foot bath applied study group and the control group. * H04: There is no difference between the preoperative body temperatures of the patients in the foot bath applied study group and the control group. * H05: There is no difference between the preoperative oxygen saturations of the patients in the foot bath applied study group and the control group. * H06: There is no difference between the preoperative pain levels of the patients in the study group and the control group where foot bath was applied. On the day of surgery, participants will be asked to keep their feet in 40 hot water for 20 minutes, 1 hour before the surgery. If there is a comparison group: Researchers will compare the control group to see if there are any differences in the patients' anxiety level and physiological parameters.