I am not sure but this sounds like obsessive-compulsive disorder.(although in searching the links they do mention other conditions that have OCD associated with them)I don't know anything about obsessive-compulsive disorder (OCD) from experience but did search out some links that may be helpful:
www.kidshealth.org/parent/emotions/behavior/OCD.html www.emedicine.medscape.com/article/918303-overview www.phobias-help.com/ocd_obsessive_compulsive_disord... A mental health professional should be able to determine whether OCD behavior in children is a separate condition or symptoms of another disorder. I suggest you see your child's physician and let them help you
with this problem and see if mental health help is in order.. I wish you the best, good luck and God bless.