Rubbing dented area with brush
Now either with your fingers or a brush, thoroughly rub the dented area so as to fluff up the fibers. Rubbing will make the fibers loose and will bring them into the original form.
Using Hairdryer on Carpet Dents
Now if your carpet contains acrylic or modacrylic then use a simple hairdryer on the dents. As you will blow the hairdryer on the dents, it will have the fibers fluffed up in to the original form.
Ice cubes and Vacuum
Perhaps the easiest way to get rid of carpet dents is by using ice cubes. Simply put some ice cubes on the dented areas and allow the ice to melt. Once the ice has melted run the vacuum cleaner on the affected area. The vacuum will pull the fibers of carpet and have them erected into the normal position.
Wet towel and iron
If you do not have vacuum cleaner available in your house then you can use a wet terry towel and iron for the same purpose. Put a wet terry towel on the carpet dents and move a preheated iron over it. Leave the towel to dry itself. As you will remove the towel you will see that dents are gone.