Background:The maternal mortality rate due to hypertension in pregnancy is 14% of 289,000 deaths (WHO, 2015), and in Indonesia 25.8%. In Central Java Province in 2017 32.97% and Banjarnegara District 23.8%. Warm water foot bath therapy with Epsom Salt and Lemongrass Oil is a complementary effort in managing hypertension because the content of MgSO4 compounds in Epsom Salt and Sitronella from Lemongrass Oil is able to exert effects on changes in blood pressure through the influence of Magnesium and Nitric Oxide (NO) biomarkers. Objective:To explain the effect of foot bath therapy using warm water, Epsom Salt, and Lemongrass Oil on changes in biomarkers and blood pressure in pregnant women with hypertension. Methods:Quasy experiment with pretest-posttest with control group design. The research subjects were pregnant women with hypertension according to the inclusion and exclusion criteria of 40 respondents. Data analysis using Paired-t Test, One Way Anova and Multiple Linear Regression with a significance level <0.05. Results:There is a therapeutic effect of warm foot soaking with Epsom Salt 1% for 3 days on increasing Mg, NO, and blood pressure levels with p value <0,05. Conclusion:There is an effect of foot bath therapy using warm water, Epsom Salt, and Lemongrass Oil on changes in biomarkers and blood pressure in pregnant women with hypertension.