Catagory Post/Content will not display

My “post content” will not display when I click on a category located on my navagation bar.First,I click on the category,only the title of the post display but not the content.Then I will click on the title and the rest of the content/post will appear.Can anybody help me correct this?? I am new at all of this.I have no knowledge of how to apply HTML,PHP or CSS.I have about seven Plugins for different functions and thought to deactivate them all and see if this will solve the problem?? Can anybody help me??