"Comorbid conditions" are medical conditions that happen at the same time as another condition. It means a person has two or more health problems at once. Full definition
Millions of Americans are diagnosed with emotion regulation disorders, such as borderline personality disorder (BPD) and other comorbid conditions like post-traumatic stress disorder (PTSD), and severe depression. (newharbinger.com)
Major depression is among the most common comorbid conditions in problem gambling. (link.springer.com)
About 65 % of children with ADHD still meet criteria for the diagnosis in adolescence [5][6] In addition, about 62 % of children with ADHD below 19 years have at least one comorbid disorder, whereas 34 % even have two or more comorbid conditions [7]. (journals.plos.org)