Thanks for your question!
If this started occurring after a new application install you may want to uninstall the application to see if it helps. Go to Apps>Settings>Application Manager and press on the application you wish to uninstall. If that does not help, try restarting the device.
If you need additional assistance or information, please just write us again on this forum or you can also try calling Samsung Customer Support at our toll free number 1-888-987-4357 between the hours 7:00 a.m. to 9:00 p.m. Monday through Friday, and 9:00 a.m. to 6:00 p.m. Saturday, CST. From there, a representative can assist you further!
You can also chat live with a support agent by following the link below and clicking on Mobile Phones under Live Chat Support, or feel free to ask us on Twitter @SamsungSupport for speedy responses in the U.S.
Chat Support: http://goo.gl/ZALJm
Thanks and have a great day!