11 Startling Signs You Might Be Experiencing Vasovagal Syncope
3. Lightheadedness And Dizziness

It's common for individuals to experience lightheadedness and dizziness right before they faint. The symptoms may feel very similar to those experienced during a panic attack, and it might be hard to distinguish mental anxiety from physical lightheadedness. With that said, if individuals are aware they're prone to episodes of vasovagal syncope, dizziness and lightheadedness can both be seen as precursors to a fainting episode. When they occur, patients should sit or lie down to minimize the risk of potential injury from fainting. The lightheadedness occurs because of the lack of blood flow to the brain. It's hard for an individual to keep their balance and remain standing.
4. Nausea

Patients with vasovagal syncope might experience nausea immediately before fainting. The sensation may be similar to the one many have right before throwing up. Rather than vomiting, though, there's a loss of consciousness. Along with nausea, individuals might experience uncontrollable yawning in an attempt to deliver more oxygen to the brain. When nausea precedes a loss of consciousness, the chances of the episode being related to vasovagal syncope are higher. If an individual faints without any warning signs, there might be a more serious underlying condition. Individuals should sit down if they experience nausea following exposure to a trigger. The nausea will generally subside when the body's blood pressure returns to normal.