Factitious disorder symptoms involve mimicking or producing illness or injury or exaggerating symptoms or impairment to deceive others. People with the disorder go to great lengths to hide their deception, so it may be difficult to realize that their symptoms are actually part of a serious mental health disorder. They continue with the deception, even without receiving any visible benefit or reward or when faced with objective evidence that doesn't support their claims. Factitious disorder signs and symptoms may include: Clever and convincing medical or psychological problems 
Extensive knowledge of medical terms and diseases
Vague or inconsistent symptoms
Conditions that get worse for no apparent reason
Conditions that don't respond as expected to standard therapies
Seeking treatment from many different doctors or hospitals, which may include using a fake name
Reluctance to allow doctors to talk to family or friends or to other health care professionals
Frequent stays in the hospital
Eagerness to have frequent testing or risky operations
Many surgical scars or evidence of numerous procedures
Having few visitors when hospitalized
Arguing with doctors and staff
 Factious disorder imposed on another Factitious disorder imposed on another (previously called Munchausen syndrome by proxy) is when someone falsely claims that another person has physical or psychological signs or symptoms of illness, or causes injury or disease in another person with the intention of deceiving others. People with this disorder present another person as sick, injured or having problems functioning, claiming that medical attention is needed. Usually this involves a parent harming a child. This form of abuse can put a child in serious danger of injury or unnecessary medical care. How those with factitious disorder fake illness Because people with factitious disorder become experts at faking symptoms and diseases or inflicting real injuries upon themselves, it may be hard for health care professionals and loved ones to know if illnesses are real or not. People with factitious disorder make up symptoms or cause illnesses in several ways, such as: 
Exaggerating existing symptoms. Even when an actual medical or psychological condition exists, they may exaggerate symptoms to appear sicker or more impaired than is true.
Making up histories. They may give loved ones, health care professionals or support groups a false medical history, such as claiming to have had cancer or AIDS. Or they may falsify medical records to indicate an illness.
Faking symptoms. They may fake symptoms, such as stomach pain, seizures or passing out.
Causing self-harm. They may make themselves sick, for example, by injecting themselves with bacteria, milk, gasoline or feces. They may injure, cut or burn themselves. They may take medications, such as blood thinners or drugs for diabetes, to mimic diseases. They may also interfere with wound healing, such as reopening or infecting cuts.
Tampering. They may manipulate medical instruments to skew results, such as heating up thermometers. Or they may tamper with lab tests, such as contaminating their urine samples with blood or other substances.
