If `overflow-x` is not scrolling horizontally as expected, there might be several reasons for this issue. Here are some common troubleshooting steps to address the problem:
1. **Check the Parent Element**: Ensure that the parent element of the content with `overflow-x` is not restricting its width. If the parent element has a fixed or limited width, it can prevent horizontal scrolling.
2. **Content Width**: Verify that the content within the element with `overflow-x` has a width that exceeds the width of the container. Horizontal scrolling will only occur if the content is wider than the container.
3. **White Space**: Be cautious of leading or trailing white spaces in your content. They can affect the total width of the content and may prevent horizontal scrolling.
4. **Positioning**: Check the positioning and layout of the element. Elements with properties like `position: fixed` or `position: absolute` may not scroll horizontally as expected. Ensure that the element's positioning is conducive to horizontal scrolling.
5. **Overflows Hidden in Parent Elements**: Make sure that none of the parent elements have `overflow: hidden` set, as this can hide any content that extends beyond the container's dimensions.
6. **Text Overflow**: If you are trying to scroll horizontally in a text element (e.g., a paragraph or a div with text content), ensure that you don't have text-overflow properties set that might truncate the text.
7. **CSS Rules**: Review any CSS rules, such as `white-space`, `display`, or `float`, that might affect the layout and behavior of the content. These properties can sometimes impact horizontal scrolling.
8. **Content Padding and Margin**: Check if padding, margins, or border properties around the content are preventing it from extending beyond the container's boundaries.
9. **Browser Compatibility**: Ensure that your CSS and HTML are compatible with the web browser you're using. Different browsers may have different behavior for CSS properties.
10. **Browser Extensions and Add-ons**: Disable any browser extensions or add-ons that might affect the rendering or behavior of web pages. Some extensions can interfere with page scrolling.
11. **Testing in Multiple Browsers**: Test the behavior of `overflow-x` in multiple web browsers to rule out browser-specific issues.
If you're still experiencing issues with `overflow-x` not scrolling horizontally after checking these factors, please provide more specific details about your HTML and CSS code, and I can offer further assistance.