Do you ever wonder why you have that persistent pain in your back? Or where that chronic headache comes from? Scientists may finally have the answer.

What is true for one type of arthritis is not necessarily true for another type. For example, broken bones have been linked to rheumatoid arthritis for years but not to osteoarthritis. However, new research may change this.

It's not known what causes the death of brain cells in Alzheimer's disease, but there are plenty of theories. A new explanation suggests it may be caused by an overabundance of blood vessels.

Most often, patients consider having a genetic risk for a disease means that having a gene increases the likelihood of developing a particular medical condition. That's not the case with a new Parkinson's gene.

People with lupus have to deal with enough pain without worrying about headaches. Even though lupus patients were once told their headaches were caused by their disease, it now seems like they should be treated as a separate problem.

Potential Parkinson's disease patients now have an easier tool to aid with diagnosis. Called DaTscan, it marks the first diagnostic imaging tool approved by the U.S. Food and Drug Administration.

Doctors may soon be able to predict who is at risk for Alzheimer's disease by pinpointing chemical changes in the brain many years before symptoms develop.

A traumatic brain injury won't cause Parkinson's disease. Instead it may make patients more susceptible to developing the neurodegenerative disorder.

Kids with special needs are struggling in the classroom, far more than their peers. Kids with special needs feel more isolated, are the victims of bullying at far greater rates, and are less motivated to do well academically.

It can take a while to get back to normal even after a mild traumatic brain injury. Regardless of severity, headaches are common in the year after such an injury.