The US was declared polio-free over 30 years ago, but now an unknown illness that may be related to the disease is causing concern in California.

People with chronic pain often have to follow strict medication regimens. Misreporting medication usage is more common and dangerous than people might think.

It's not all in your head — stress really does make a difference when it comes to the headaches or migraines that you might experience.

Patients with Alzheimer’s disease sometimes have severe agitation that needs to be managed with medication. A new study found that one medication could be a good treatment.

People with multiple sclerosis already may feel tired during the day or have difficulty sleeping. But an undiagnosed sleep problem could make matters worse.

Persistent pain that affects multiple parts of the body can be common among older adults. And for some, sleep habits may play a role in this widespread pain.

Multiple sclerosis — a disease that affects the central nervous system — can cluster in families. How important family history is in the development of the disease was assessed in a recent study.

The most common pain reliever used by Americans — aspirin — is being used to assist with a number of serious medical conditions. And aspirin may aid with yet another potentially lethal condition.

If you're not a big fish eater, you may be missing out — or at least your brain might be missing out on a helpful nutrient found in fish oil.

Knee and hip replacement surgeries are becoming more common as the population ages. Thus, there is a greater need to ensure these replaced joints don't fail.