How do I remove all subcategory posts from showing up in the parent category page ? I just want the subcategory posts to show up in the subcategory page.

Eg:

In the about category page below, both the posts in the about category and the posts in the sub category named "siddhamedicine" is showing up. I only want the posts in the parent "about" category to show up. Please help...

About | Siddha Medicine :: Natural Remedies :: Natural Health :: Natural Health Remedies

Thanks for your help...