The causes of leg pain can be musculoskeletal, neurological, or vascular. Shin splints and stress fractures can result from repetitive sports, such as running. Leg pain can sometimes indicate a serious vascular problems.
Noun. 1. altruism-the quality of unselfish concern for the welfare of others. selflessness. unselfishness-the quality of not putting yourself first but being willing to give your time or money or effort etc. for others; rural people show more devotion and unselfishness than do their urban cousins.
Empathy for others. Some wildlife researchers believe that altruism â defined as an act in which an animal sacrifices its own well-being for the benefit of another animal â is a well-documented behavior. Those who say animal altruism exists cite examples such as dolphins helping others in need or a leopard caring for a baby baboon. In fact, in 2008, one bottlenose dolphin came to the rescue of two beached whales in New Zealand and led them into safe waters.