Why do you get dizzy when stand up and then start shaking?

Vasovagal syncope (also called neurocardiogenic syncope or simple faint) is a common cause of dizziness and fainting. It occurs when there is a sudden drop in blood pressure, which causes the brain to receive less blood. This can happen when you stand up quickly, after eating a meal, or when you are under emotional stress.

What causes vasovagal syncope?

The exact cause of vasovagal syncope is not fully understood, but it is thought to be related to a problem with the communication between the heart and the brain. When you stand up, your body's blood vessels dilate (widen) to help increase blood flow to your brain. In some people, this dilation causes too much blood to pool in the legs and not enough blood to reach the brain. This can cause a sudden drop in blood pressure, which can lead to dizziness, lightheadedness, and fainting.

What are the symptoms of vasovagal syncope?

The most common symptoms of vasovagal syncope include:

* Dizziness

* Lightheadedness

* Feeling like you are going to faint

* Blurred vision

* Nausea

* Vomiting

* Shaking

* Sweating

* Pale skin

* Cold hands and feet

How is vasovagal syncope treated?

Most cases of vasovagal syncope are self-limited and do not require treatment. However, if you experience frequent episodes, your doctor may recommend one or more of the following treatments:

* Lifestyle changes: Avoiding triggers such as standing up quickly, eating large meals, and emotional stress can help to reduce the risk of episodes.

* Medications: Medications such as beta-blockers and calcium channel blockers can help to prevent episodes of vasovagal syncope.

* Pacemakers: In some cases, a pacemaker may be recommended to help regulate the heart rate and prevent episodes of vasovagal syncope.

When to seek medical attention

Seek medical attention immediately if you experience any of the following symptoms:

* Fainting that lasts for more than a few minutes

* Chest pain

* Shortness of breath

* Confusion

* Seizures

Vasovagal syncope is a common condition that can be caused by a variety of factors. Most cases are self-limited and do not require treatment. However, if you experience frequent episodes, it is important to see a doctor to rule out any underlying medical conditions and to discuss treatment options.