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.
Altruism is one aspect of what social psychologists refer to as prosocial behavior. Prosocial behavior refers to any action that benefits other people, no matter what the motive or how the giver benefits from the action. Remember, however, that pure altruism involves true selflessness. While all altruistic acts are prosocial, not all prosocial behaviors are completely altruistic. For example, we might help others for a variety of reasons such as guilt, obligation, duty, or even for rewards. Psychologists have suggested a number of different explanations for why altruism exists, including: