Stress accumulation can lead to suicide attempts, self injury, unhealthy stress, anger, rage, fear, depression, unhealthy coping mechanisms, focus problems, and more.
There's negative and healthy ways to react to stress. I picked up on DBT/CBT in treatments and more positive coping skills; those include listening to music, going to therapy appointments, advocating for self, running, organizing, drawing, writing, walking, etc.
Where as for negative coping skills, I'd self harm, engage in Eating Disorder behaviours, lie, "break down", ignore others, isolate, etc.