▪️Factitious disorders: Factitious disorders are conditions in which a person knowingly and intentionally creates or complains of physical and/or emotional symptoms in order to place the individual in the role of a patient or a person in need of help.

▪️Sexual and gender disorders: These include disorders that affect sexual desire, performance, and behavior. Sexual dysfunction, gender identity disorder, and the paraphilias are examples of sexual and gender disorders.

▪️Somatic symptom disorders: A person with a somatic symptom disorder, formerly known as a psychosomatic disorder or somatoform disorder, experiences physical symptoms of an illness or of pain with an excessive and disproportionate level of distress, regardless of whether or not a doctor can find a medical cause for the symptoms.

▪️Tic disorders: People with tic disorders make sounds or display nonpurposeful body movements that are repeated, quick, sudden, and/or uncontrollable. (Sounds that are made involuntarily are called vocal tics.) Tourette's syndrome is an example of a tic disorder.

➖ Other diseases or conditions, including various sleep-related problems and many forms of dementia, including Alzheimer's disease, are sometimes classified as mental illnesses, because they involve the brain.