Depression (major depressive disorder) - Symptoms and causes Depression is a mood disorder that causes a persistent feeling of sadness and loss of interest Also called major depressive disorder or clinical depression, it affects how you feel, think and behave and can lead to a variety of emotional and physical problems
Bipolar disorder - Symptoms and causes - Mayo Clinic Bipolar disorder, formerly called manic depression, is a mental health condition that causes extreme mood swings These include emotional highs, also known as mania or hypomania, and lows, also known as depression
Seasonal affective disorder (SAD) - Symptoms causes - Mayo Clinic Seasonal affective disorder (SAD) is a type of depression that's related to changes in seasons — SAD begins and ends at about the same times every year If you're like most people with SAD, your symptoms start in the fall and continue into the winter months, sapping your energy and making you feel moody These symptoms often resolve during the spring and summer months Less often, SAD causes
Mental illness - Symptoms and causes - Mayo Clinic Overview Mental illness, also called mental health disorders, refers to a wide range of mental health conditions — disorders that affect your mood, thinking and behavior Examples of mental illness include depression, anxiety disorders, schizophrenia, eating disorders and addictive behaviors
Anxiety disorders - Symptoms and causes - Mayo Clinic Symptoms may start during childhood or the teen years and continue into adulthood Examples of anxiety disorders include generalized anxiety disorder, social anxiety disorder (social phobia), specific phobias and separation anxiety disorder
Schizoaffective disorder - Symptoms and causes - Mayo Clinic Overview Schizoaffective disorder is a mental health condition that is marked by a mix of schizophrenia symptoms, such as hallucinations and delusions, and mood disorder symptoms, such as depression, mania and a milder form of mania called hypomania Hallucinations involve seeing things or hearing voices that others don't observe
Adjustment disorders - Symptoms and causes - Mayo Clinic Symptoms Symptoms depend on the type of adjustment disorder These symptoms can vary from person to person You experience more stress than would generally be expected in response to a trying event, and this stress causes a lot of problems in your life Adjustment disorders affect how you feel and think about yourself and the world
Mood disorders - Symptoms and causes - Mayo Clinic Depression related to substance or medicine use — features depression symptoms that start during or soon after using a street drug or medicine, or after withdrawal from these substances Bipolar disorders Bipolar disorders feature mood swings that include emotional highs called manic or hypomanic episodes, and lows, called depressive episodes