A "chemical imbalance" refers to the idea that mental health disorders, such as depression or anxiety, may be caused by irregular levels of certain chemicals in the brain, particularly neurotransmitters like serotonin and dopamine. These chemicals play a crucial role in regulating mood, emotions, and overall mental well-being. When their levels are disrupted, it can lead to various psychological symptoms. While the concept of chemical imbalance has been widely discussed, it is important to note that mental health is influenced by a combination of factors, including genetics, environment, and life experiences. Treatments, such as medication and therapy, aim to restore balance and improve mental health outcomes.