Headache is a general term to describe any pain felt in the head, scalp or neck region, but not all headaches are alike. The International Headache Society developed a headache classification system for doctors to use as a diagnostic tool to help them determine the most effective course of treatment.

Seizures occur when a group of nerves in the brain suddenly produce a surge of electrochemical impulses. This surge in brain activity interrupts normal functions resulting in symptoms thatoften mimic a stroke.

A TIA, or transient ischemic attack, is similar to a stroke, but symptoms resolve in a few minutes to 24 hours. TIAs are often referred to as ministrokes, but may be warning signs of a future stroke. MayoClinic.com states that one in three people who have a TIA will eventually have a stroke.

Topiramate is an anticonvulsant used to treat some types of seizures in individuals with epilepsy and Lennox-Gastaut syndrome. It may also be prescribed to prevent migraines and to manage an alcohol addiction. Unfortunately, weight loss, along with other gastrointestinal problems, is a side effect of the medication.

A tingling sensation can occur with numerous medical conditions. Any changes to nerve function can lead to unusual sensations, including tingling, burning, pins-and-needles, itchiness and numbness. It is common to experience a combination of these sensations.

Multiple sclerosis, or MS, is a condition that affects the central nervous system, consisting of the brain and spinal cord. Since the central nervous system controls the actions and activities of the body, the symptoms of MS can be quite variable.

Damage to the nerves of the peripheral nervous system is referred to as peripheral neuropathy. The peripheral nervous system is a network of neurons that connect the spinal cord and the brain to the rest of the body.

Multiple sclerosis and rheumatoid arthritis are both chronic and crippling diseases that affect the quality of a patient's life. Rheumatoid arthritis affects the joints, while multiple sclerosis affects the brain and spinal cord.

Caffeine, chemically known as 1,3,7-trimethylxanthine, is considered to be the most popular, largely unregulated drug in the world. Caffeine is consumed in coffee, tea, cocoa, chocolate, many soft drinks and some drugs.

When you have a headache, you may wonder what is going on inside your brain. Brain tissue itself cannot feel pain. Instead, your brain processes pain sensations that it receives from the rest of the body.

Tendonitis is a painful swelling in a tendon and surrounding tissues, and common examples of this overuse injury include tennis elbow, Achilles tendonitis in runners and wrist tendinitis from typing.

A stroke occurs when the arteries that supply the brain with blood and oxygen become blocked reducing the flow to the brain. A stroke can also be the result of a burst aneurysm. Both can cause brain cells to die and can affect any area of the brain.