In some cases, there might be an element that is literally wider than the document is, which might cause horizontal overflow scrolling. You could use a little JavaScript to help you find the culprit.
open DevTools in browser and run this on console u will get the element causing overflow
var docWidth = document.documentElement.offsetWidth;
[].forEach.call(
document.querySelectorAll('*'),
function(el) {
if (el.offsetWidth > docWidth) {
console.log(el);
}
}
);
Kanged From Here BTW