**TL;DR summary:** This research explores the relationship between stuttering and emotion regulation difficulties, repetitive negative thinking, and experiential avoidance. It found that experiential avoidance is linked to emotion regulation problems in people who stutter. Experiential avoidance and repetitive negative thinking can predict emotion regulation difficulties in this group, but there's no significant difference in repetitive negative thinking compared to non-stutterers. Additionally, experiential avoidance (where a person avoids fearful thoughts or feelings) was correlated with emotion regulation difficulties in people who stutter. This can then contribute to the persistence of stuttering into adulthood. Techniques like reducing stress reactivity, managing negative thinking, and improving emotional clarity can help, as well as accepting emotions and developing healthier ways to regulate them can reduce stuttering. Avoiding negative experiences and negative emotions may provide short-term relief but can increase anxiety in the long run and can reinforce a cycle of negative thoughts.