Childline says it received over 12,000 calls, texts and messages from children and young people on Christmas Day.
The ISPCC's listening service says almost three quarters of contacts were from boys and young males.
National Childline Manager Margie Roe said the majority of calls were from children who were experiencing family difficulties and mental health issues.
Childline says the volume of calls and messages highlights the fact that Christmas can be a difficult time for many children.