Can drinking plenty of fluids bring up the pressure in a person with low blood pressure?

Plenty of fluids with a little bit of salt helps to bring up the blood pressure in an otherwise normal person. But first the cause of the low blood pressure has to be investigated, if it is due heart failure, drinking plenty of fluids can worsen it. If the fall in blood pressure is due to reduced volume of fluids in the body after a bout of loose motion or vomiting, drinking a lot fluid with salt content can normalize the blood pressure.