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 the selfless helping of others. However, biologists, philosophers, sociologists and psychologists have been telling us for some time that there is no such thing as altruism and imply that it is self-interest and not actually the benevolent helping of others.