When the myelin, or outer sheathing covering the nerves, is degenerated, it results in nerve damage. When this happens, the nerves are unable to function properly in normal communication between the brain and spinal cord. Vitamin deficiency is one cause of nerve damage.

If you get a sudden headache while you are exercising, you could have a primary headache, which is usually benign. However, some headaches are secondary to medical problems, which in rare instances can indicate a serious or even life-threatening medical condition.

The relationship status between niacin and migraines is complicated with little scientific information. Niacin is a vitamin that typically causes widening of the blood vessels, or dilation.

ALS, also known as amyotrophic lateral sclerosis or Lou Gehrig disease, is a progressive, incurable disease of the nervous system. It is fatal on average within a few years, though some people live longer.

Seizures are due to electrical activity in the brain, which results in changes in consciousness and movement. Symptoms of seizures vary in patients: some patients may just have a staring spell, while others may experience twitching in their limbs.

ALS, or Amyotrophic Lateral Sclerosis, is a disease of progressive muscle weakness which occurs due to the destruction of motor neuron cells in the nervous system. Without these neurons, the brain is unable to send information to muscles.

Patients with neuropathy experience chronic pain and tingling, and acupressure may provide some relief. Neuropathy results from nerve damage associated with a traumatic accident, infection, metabolic disorder, such as diabetes or exposure to toxins.

There are four types of headaches, including tension headaches, inflammatory headaches, traction headaches and vascular headaches. A vascular headache occurs because of abnormal functioning with the blood vessels in the brain. Three types of vascular headaches include migraine, cluster and toxic headaches.

Although the exact cause of migraines and headaches is not well known, they all have a common anatomy and physiology. The brainstem and upper cervical spinal cord contain a region called the trigeminocervical nucleus.

A sinus headache is typically the result of swollen and inflamed sinuses. A sinus infection, the common cold or allergies can cause inflammation in the nasal cavity, placing pressure on different parts of the head.

Champagne is a part of many special occasions, from weddings to New Year's Eve celebrations. Although it can be enjoyable to drink, it can also cause headaches after the fact. Headaches after drinking champagne may be caused by dehydration, mineral depletion or even an allergy to the sulfites in champagne.

Whether they are present when you awaken or cause you to wake up early, morning headaches are clearly not the ideal way to start your day. They are relatively common and occur with a variety of conditions.