What is a conversion disorder? How can you tell if someone in your family has it?

Get checked out. A conversion disorder is where a person has a physical symptom or symptoms without any physical basis and there are underlying psychological issues bringing this about. The person needs to have a physical evaluation to rule out any organic causes and then a psychological evaluation to determine the psychological problem and hopefully treat it.
Dx of exclusion. Conversion disorder is where patients suffer neurological symptoms such as numbness, blindness, paralysis, or even seizures, but without a neurological cause. It is a diagnosis of exclusion, meaning that a neurologist will do a thorough examination and testing, attempting to find the cause of the symptoms. If no cause can be found, the diagnosis, by exclusion, is a conversion disorder.