Frontline staff should be trained to identify so-called parental alienation, an expert has said.
PA is when one parent undermines the role of the other by turning a child against them following a separation.
Between 2013 and 2016, the Children and Family Court Advisory and Support Service in Wales dealt with 22,670 cases involving children.
The Welsh Government said it was developing information and advice services.
Psychologist Dr Sue Whitcombe said social workers, psychologists and solicitors should receive training.
“This is a severe form of child emotional abuse when at its most severe and pure form and it needs to recognised along with those other types of child abuse,” she said.