Health Information Publication Date: February 2001 Questions and Answers about Arthritis Pain What Is Arthritis? What Is Pain? How Many Americans Have Arthritis Pain? What Causes Arthritis Pain? Why Is It So Variable? How Do Doctors Measure Arthritis Pain? What Will Happen When You First Visit a Doctor for Your Arthritis Pain? Who Can Treat Arthritis Pain? How Is Arthritis Pain Treated? What Alternative Therapies May Relieve Arthritis Pain? How Can You Cope With Arthritis Pain? What Research Is Being Conducted on Arthritis Pain? causes symptoms of lower back pain cmo arthritis Where Can You Find More Information on Arthritis Pain? What Is Arthritis? The word arthritis literally means joint inflammation, but it is often used to refer to a group of more than 100 rheumatic diseases that can cause pain, stiffness, and swelling in the joints. These diseases may affect not only the joints but also other parts of the body, including important supporting structures such as muscles, bones, tendons, and ligaments, as well as some internal organs. This booklet focuses on pain caused degenerative knee arthritis cmo arthritis by two of the most common forms of arthritis--osteoarthritis and rheumatoid arthritis. What Is Pain? Pain is the body's warning system, alerting you that something is wrong. The International Association for the Study of Pain defines it as an unpleasant experience associated with actual or potential tissue damage to a person's body. Specialized nervous system cells (neurons) that transmit pain signals are found throughout the skin and other body tissues. These cells respond to things such as injury or tissue damage. For example, scalp pain cmo arthritis when a harmful agent such as a sharp knife comes in contact with your skin, chemical signals travel from neurons in the skin through nerves in the spinal cord to your brain, where they are interpreted as pain. Most forms of arthritis are associated with pain that can be divided into two general categories: acute and chronic. Acute pain is temporary. It can last a few seconds or longer but wanes as healing occurs. Some examples of things that cause acute cmo arthritis cmo arthritis pain