The term 'pain' relates to the sensation of hurt, distress and discomfort. It can vary in severity and frequency, either remaining steady and constant or pulsating.
Pain is a very individual experience - everyone feels it differently and has a different tolerance. Only the person experiencing the pain can describe it properly. This can make it difficult to treat, unless the source of the pain is clear or the type of pain described is easily associated with a certain health condition or problem.
There are a huge number of causes for pain, from accidents such as a fall to medical conditions and sports injuries. Some pains or aches are very common such as back, neck and shoulder pain, often experienced as the result of day-to-day life. Others can result from chronic medical conditions. The cause is often connected with the intensity of the pain and how long the pain is experienced - injury from an accident will hurt until the body has healed, whereas medical conditions will cause pain until an effective treatment or cure is identified.