Events caused by sleep apnea and atrial fibrillation, two disorders that share many of the same risk factors and symptoms, can wake you up to a pounding heart. Unless you have an emotional condition, such as anxiety, your increased pulse rate may have these physical causes.

Emergen-C is an over-the-counter dietary supplement manufactured by Alacer Corp., which was founded in 1972. Alacer Corp. began the Emergen-C product line in 1978, marketing it as a supplement to support a healthy immune system.

Several autoimmune diseases can attack the nervous system, including multiple sclerosis, myasthenia gravis and Guillain-Barré syndrome, among others.

Their list includes cities that have a population of 50,000 or more, and the rates provided are out of every 100,000 people. Read on to learn whether you or someone you love is at a heightened risk for contracting HIV.

Sudden, extreme fatigue occurs for a variety of reasons. Common causes include infections, severe stress and new onset depression, among others.

Many medical conditions can cause both pain in the legs and fatigue, and determining the cause of these symptoms often requires a trip to the doctor. To make a diagnosis, your doctor needs a thorough understanding of your symptoms, including what brings them on, what improves them, and other symptoms you may have.

Lymph node cancers are tumors of the lymphatic system, which is part of the body's immune system. Also known as lymphomas, these cancers are made of infection-fighting cells called lymphocytes that multiply uncontrollably. They collect in lymph nodes and other parts of the body to form tumors.

Cuts inside the nose can be challenging to treat, but with proper care, minor nose cuts respond well to home treatment.

Is there a miracle cure for your back aches lurking in your lunch? Or can your daily snack help you perform better in the gym? Whether they’re foods that fight pain, odd practices that combat disease or just unexpected dietary tricks that can deliver results, here are 10 health hacks that are just crazy enough to work.

All of us experience occasional tiredness and sleepiness. But if you feel tired and sleepy day in and day out, something else may be in play.

The toxic burden from radiation and chemotherapy can compromise or destroy the immune system. If you're undergoing chemotherapy, it's essential you not suffer nutritional deficiencies and to eat foods that bolster your immune system, rather than tax it with more toxic buildup.

Protease enzymes break down or change the composition of proteins or peptides. In addition to being important to the process of digestion and metabolism, some protease enzymes are thought to improve inflammation and strengthen the immune system, according to New York University Langone Medical Center.