<p>With the attention paid to the dark side of citizenship behavior, citizenship fatigue as its derivative field deserves further exploration. Based on the conservation of resource theory, this study introduces citizenship pressure and interpersonal sensitivity to explore whether, how, and when workplace ostracism and leader punishment behavior influence citizenship fatigue. By analyzing the data of 425 Chinese employees, we constructed a moderated mediation model. The results show that workplace ostracism and leader punishment positively associated with citizenship fatigue, and these relationships are mediated by citizenship pressure. In addition, interpersonal sensitivity moderates the positive effect of workplace ostracism rather than leader punishment on citizenship pressure, and also moderates the promoting effect of citizenship pressure on citizenship fatigue. Moreover, the mediating effect of citizenship pressure is also moderated by interpersonal sensitivity. These findings contribute to a more comprehensive understanding of the mechanisms and boundary conditions of citizenship fatigue, and provide practical guidance for organizations to reduce citizenship fatigue among employees.</p>