Behavioral therapy, which is part of the mental health field, has been found to be extremely effective with most conditions and most populations. It is the most widely recommended and prescribed therapeutic approach for dealing with childhood issues and concerns.
Studies vary, but data shows that behavioral therapy is usually 75-90% effective for people entering into treatment.
Play therapy especially is a behavioral health intervention specifically designed For the developmental age of Children under 14. However, it is important to note that starting treatment at any age, but especially during childhood, involves facing emotions, fears and anxieties. This typically means there are early periods in treatment where anxiety increases and emotions are harder to control.
So while behavioral therapy is effective, long term symptoms can sometimes worsen in the early part of treatment before things begin to settle down and the child is more regulated.