A study points out that online social games (NSG) have an impact on players’ work, life and physical health while relaxing them physically and mentally and contacting them emotionally. Players should pay attention to the occasions and time of playing NSG and its effects on physical health. Referring to the Young Internet Addiction Scale and the Liebowitz Social Anxiety Scale self-administered questionnaire, the study randomly investigated the prevalence of NSG among 862 residents in Jiangsu province, the effects of NSG on players’ work, life and physical health, and the personality characteristics of addicts. As a result, there were statistically significant differences in the proportion of players among four groups: school students, white-collar workers and other brain workers, migrant workers and other manual workers, and retired and other people, with the highest proportion of players in the school students and white-collar workers groups (36.9% and 32.4%, respectively) and the lowest proportion of players in the retired and other people group (8.7%). The difference in the proportion of addicts among the groups was statistically significant, with the highest proportion of addicts in the group of school students (8.4%) and the lowest proportion of addicts in the group of retired and others (1.0%); the risk of symptoms such as reduced work and study time, putting other things aside, reduced rest time, insomnia, and neck pain was higher in NSG addicts than in non-addicts, while the risk of symptoms such as inability to concentrate and red eyes or vision loss could not be considered higher than in non-addicts. The occurrence of symptoms of energy inability to concentrate and red-eye or vision loss cannot be considered higher than those of non-addicts; the tendency to have social anxiety in terms of fear and avoidance is a suspected risk factor for NSG game addiction.