I don't know what cause the problem, but i need to do something to avoid further damage to it.
So after a few 'research', i need to add the bed skirt to cover that area.
There are a lot of ideas on the net. Here a some of the ideas that i like...
Simple white bed skirt
(Source: Decorating Ideas Made Easy)
Nice and simple bed skirts
(Source: walmart.com)
Ruffles bed skirt
(Source: jossandmain.com)
And many other ideas that i like...
Hopefully i can start this 'project' soon...