One recent study reported that 28% of the children of mothers with FM also develop the disorder. There were no differences in psychological disorders among those offspring with FM and those who did not develop it. Another study noted that 66% of parents of children with FM reported some sort of chronic pain–with about 10% reporting FM. Close-knit families, oddly enough, were more likely to be associated with severe cases of childhood FM.
One noted that the severity of the disorder increased in children whose parents were less able to cope with their children’s pain. It is not clear if genetic or psychological factors or both are involved.