Cold baths are not good for high blood pressure. Hypertension is categorized into primary hypertension and secondary hypertension, soaking in a cold bath has no preventive or health care effect on either type of hypertension. When soaking in a cold bath, the cold water has a certain stimulation of the skin, can activate the body’s sympathetic nervous system excitation, thus making the peripheral capillary contraction, blood flow peripheral resistance increases, blood pressure will also rise. On the other hand, soaking in the water, the pressure of water pressure on the skin leads to increased capillary resistance, affecting blood flow, aggravating the load on the heart, blood pressure will also be unstable. Extra attention should be paid to, after meals, after drinking alcohol, after strenuous exercise is prohibited to take a bath, otherwise it will aggravate the original disease or produce dizziness, nausea and other symptoms. Hypertensive patients are best not to often soak in cold water bath. Suffering from high blood pressure should go to the regular hospital in time to check, follow the doctor’s prescription medication.