mental health disorders
Personality and Behavior Changes
Causes
Although people sometimes assume that changes in personality, thinking, or behavior are all due to a mental disorder, there are many possible causes. All causes ultimately involve the brain, but dividing them into four categories can be helpful: Mental disorders Drugs (including drug intoxication, withdrawal, and side effects) Disorders that affect mainly the brain Bodywide (systemic) disorders that also affect the brain Mental disorders include Overview of Anxiety Disorders None Bipolar Disorder None Depression None Overview of Dissociative Disorders (when people feel detached from themselves or from the world around them) Obsessive-Compulsive Disorder (OCD) None Overview of Personality Disorders None Schizophrenia None Overview of Somatic Symptom and Related Disorders (when mental factors are expressed as physical symptoms) Overview of Trauma- and Stressor-Related Disorders None Drugs may affect personality or behavior when they cause Intoxication: Particularly Alcohol Use (when consumed in large amounts), Withdrawal: Withdrawal symptoms , Drug Effectiveness and Safety : Drugs intended to affect brain function (including Rarely, certain antibiotics and drugs used to treat high blood pressure cause changes in personality and behavior. These disorders can affect personality, mood, and behavior. They include Alzheimer Disease None Brain infections, such as Introduction to Meningitis , Overview of Brain Tumors None Head injuries, such as a Concussion and Multiple Sclerosis (MS) None Parkinson Disease (PD) None Seizure Disorders None Overview of Stroke None Bodywide disorders that also affect the brain include Overview of Kidney Failure None Liver Failure None Low blood sugar ( Hypoglycemia ) Systemic Lupus Erythematosus (SLE) (lupus) Thyroid disorders, such as an underactive thyroid gland ( Hypothyroidism ) or an overactive thyroid gland ( Less commonly, Lyme Disease , 