The greatest hazard for personal harm comes from handling and working with computers that

The over use of the computer or in appropriate use of the computer can leads to various issues in the body. The major issues with the such use of computer can leads to the injuries in shoulders, wrist, arm, and strain on eyes due to  the overuse.

Joint pain, muscle pain. also some condition that is develop due to inappropriate use of the computer. In teens and children are more prone to develop such psychological and physical problems due to computer games.