Acute diarrhea is a medical condition that causes the patient to pass stool more frequently, and persistently vomit which results in severe dehydration. It can lead to low blood pressure, cardiovascular collapse, exhaustion, and even death.

Low blood pressure during pregnancy can lead to serious complications, similar to high blood pressure. It is a primary cause of dizziness, fatigue, and fainting in pregnant women. Therefore, monitoring blood pressure levels should be a routine part of prenatal checkups.

Intravenous injection is a fundamental technique widely used in modern medicine. It allows for the direct delivery of medications into the circulatory system, enabling rapid onset of drug effects. However, there are specific situations where intravenous injection should not be used.