Sufferers of BIID are uncomfortable with a part of their body, such as a limb, and feel confident that removing or disabling this part of their body will relieve their discomfort. Sufferers may have intense feelings of envy toward amputees. They may pretend that they are an amputee, both in public and in private. Sufferers experience the above symptoms as being strange and unnatural. They may try to injure themselves to require the amputation of that limb.
The idea of medically amputating a BIID sufferer's undesired limb is highly controversial. Some support amputation for patients with BIID that cannot be treated through psychotherapy or medication. Others emphasize the irreversibility of amputation and promote the study of phantom limbs to treat the patient from a psychological perspective instead. Many psychologists and neurologists have ventured theories into what causes this type of thought. The common leading idea is that Body Integrity Identity Disorder, or BIID, occurs when the brain is not able to provide an accurate plan of the body. In this case, the brain sees the offending limb as being foreign and not actually a part of the person, thus the desire to have it removed.
Body Integrity Identity Disorder (BIID, also referred to as amputee identity disorder) is a psychological disorder in which an otherwise healthy individual feels that they are meant to be disabled.