Therefore, if you artificially induce further sweating through a sauna while the body is already depleted of large amounts of fluids and salts due to diarrhea, the body's fluid and electrolyte balance will rapidly collapse, leading to severe dehydration. Excessive salt loss due to sweating and diarrhea can damage kidney function and cause fluid retention; furthermore, a decrease in blood volume resulting from dehydration and salt deficiency can lead to life-threatening situations such as a drop in blood pressure, dizziness, circulatory collapse, and fainting.