Comorbidity is a term used in medicine and psychology to describe the presence of two or more different medical conditions or mental health disorders in a single individual at the same time. It is common for individuals to experience comorbid conditions, as certain health conditions or mental health disorders may be related to or exacerbate one another. This can complicate diagnosis and treatment, as symptoms may overlap or interact in complex ways. Studying comorbidity can help researchers and healthcare professionals better understand the relationships between different conditions and develop more effective treatment approaches.