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.
The word altruist means a person who has an unselfish concern for the welfare of others. In Zoology, the word is applied to instinctive behavior that is detrimental to the individual but favors the survival or spread of that individual's genes, as by benefiting its relatives. Their main headquarters is the Altruist Camp.