Pre Experimental design was adopted for the study to assess the effectiveness of Hot Water Foot Bath Therapy in patients with fever admitted in selected hospitals of PCMC area, Pune. Purposive sampling technique was used to collect the sample. The conceptual framework was based on Lydia E. Hall’s Core, Care, and Cure Model. Data was collected through the observational check list. The Pre-test results showed that majority of the sample i.e. 84 %( 28) had temperature in the range of 100 o F to 102.6 o F in both groups. Whereas in post test only 21% patients had temperature above 100 o F and rest have the temperature in range between 98.4o F to 99.8 o F in experimental group. Mean effect of hot water foot bath on fever at pre intervention was 101.04±0.04 whereas in at post intervention it was 99.37±0.58 in experimental group. Whereas there is no major difference in pre and post level of temperature in control group. The result indicated that the level of temperature reduced in experimental group hence it was proved that hot water foot bath was effective in reducing temperature. The findings on relationship of the selected variable of patients showed that none of the demographic variables was found to have significant association with temperature level.