For thousands of years, people have used hot springs for relaxation and pain relief. In the 1940s, Candido Jacuzzi developed a submersible pump to provide hydrotherapy treatments for his son, who had rheumatoid arthritis. This development grew from a therapeutic treatment to the luxury item known as the hot tub.

Although the wear-and-tear type of arthritis, or osteoarthritis, is much more common than rheumatoid arthritis, both frequently affect the hands.

Barometric pressure, or air pressure, is the weight of the atmosphere on a particular surface. Air pressure is closely associated with weather and can often be used to predict the forecast.

Many different diseases cause hand and finger pain. Carpal tunnel syndrome and rheumatoid arthritis are common diseases that affect your hands, but they are distinctly different conditions.

According to the National Institute of Health (NIH), the neck is one of several areas where the lymph nodes (also referred to as lymph glands) can be detected by touch.

A 5-year-old child may experience swollen lymph nodes during an illness -- in fact, the glands can swell to twice their normal size. Bacterial infections and viral infections can cause the lymph nodes to become enlarged.

Rheumatoid arthritis, or RA, is an autoimmune disease that attacks the body's joints causing pain, inflammation and destruction of the cartilage and bone. It is one of nearly 100 types of arthritis afflicting Americans, according to Harvard Health Publications.