If you had parents who were critical, judgemental, neglectful, unloving… or parents who were emotionally unavailable or physically absent, your inner child feels rejected and abandoned. S/he believes that you must do everything you can to make people happy, or they might leave or stop caring for you.
If your parent’s love for you was conditional (that is, offered or withheld dependant on your behaviour or achievements)… your inner child is desperate to please others in order to win their love.
If you were punished or criticised for mistakes growing up, your inner child is anxious and afraid of disappointing people and letting them down. S/he feels they must make sure they are doing things right by everyone else, and that everybody is pleased with the job they are doing.