Vitamins can benefit your health greatly, especially when included as part of a daily diet. Some people may experience symptoms, such as headaches, by consuming too much of any one vitamin. When taken in high dosages, vitamins become toxic.

Strokes can cause facial paralysis or partial loss of muscle control. These symptoms make speech, eating, facial expressions and general facial movement difficult or impossible for stroke victims. Specific exercises can help stroke patients regain partial or full mobility in their facial muscles.

The brain requires a regular supply of blood in order to function properly. Inadequate flow of blood, which can be caused by a stroke or other events, is devastating to the brain.

A stroke is defined as the sudden onset of neurological symptoms that result from a disruption in the flow of blood to part of the brain. If a stroke occurs while sleeping, the presence of symptoms after awakening would constitute the signs of a stroke.

Diabetes impairs your body’s ability to produce or use insulin, which regulates blood glucose levels and generates energy. In type I diabetes, the pancreas does not produce insulin.

If you have a left-sided headache, you may wonder if it could be due to something serious. Headaches are very common. More than 90 percent are primary headaches, meaning they are not due to an underlying brain disease or injury.

A transient ischemic attack offers a warning, according to the American Heart Association. Symptoms resembling a stroke occur during such an attack, but subside. More than half of those who suffer a TIA will have a stroke, typically within a year.

According to the National Headache Foundation, about 29.5 million people in American suffer from migraine symptoms, including soreness in the temples. Temple soreness can be painful and debilitating, interfering with daily activities and relationships.

Epileptic seizures have three phases. The preictal phase is the time leading up to the seizure. The ictal phase is the seizure itself. The postictal phase is the period after the seizure. The postictal phase may last from seconds to days, depending on the type of seizure.

A migraine headache is often felt as a throbbing and pulsating pain on an area of the head that may be accompanied by nausea, vomiting or sensitivity to light and sound, according to the National Institute of Neurological Disorders and Stroke.

Involuntary processes in your body such as heart rate and blood pressure are controlled by a segment of your nervous system called the autonomic nervous system. One part of the autonomic system, called the sympathetic nervous system, controls your basic “fight-or-flight” responses.

Most people don't think much about their feet until they hurt or give you trouble. Burning and tingling in the feet usually signals nerve irritation that may be due to injury, infection or other medical disorders.