Almost 100 children suffering from mental health problems caused by abuse contacted Childline every week last year, new figures show.
The NSPCC's free, 24-hour service undertook 85,000 counselling sessions in 2014 to 2015 - one every six minutes - for youngsters with mental health problems, it says in its annual review.
More than 5,000 of those had also sought help for physical or sexual abuse and one in ten calls to the confidential service was about abuse.
Childline also said that "disturbingly" many children felt that they had been left to fend for themselves, saying the number of children unable to get help had doubled.
The report, "Always there when I need you", said there had been a 124% increase in the number of counselling sessions where young people talked about problems accessing services since the previous year.