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By Mayo Clinic staffThe exact causes of schizoid personality disorder are unknown, although a combination of genetic and environmental factors — particularly in early childhood — are thought to contribute to development of all personality disorders.
A person with schizoid personality disorder may have had a parent who was cold or unresponsive to emotional needs, or might have grown up in a foster home where there was no love. Or, because people with schizoid personality disorder are often described as being hypersensitive or thin-skinned in early adolescence, a person with schizoid personality disorder may have had needs that others treated with exasperation or scorn.
A family history — such as having a parent who has any of the disorders on the schizophrenic spectrum — also increases the chances of developing the disorder.
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