Pain is likely to be a different problem in the old-old and the frail elderly compared to the young-old. Little attention has been paid to date to the impact of pain on. Learn about back pain in adolescents and young adults. Find out what could be causing the pain, stiffness, and inflammation and find out how to treat it. Old age refers to ages nearing or surpassing the life expectancy of human beings , and is thus One study distinguishes the young old (60 to 69), the middle old ( 70 to 79), and the very old (80+). Another study's . Pain afflicts old people at least 25% of the time, increasing with age up to 80% for those in nursing homes.