What type of skin diseases are platies prone to?

One of my platies keeps rubbing herself against the rocks and even tries spinning herself on them. I know she itching herself and shes red in general but shes got like a white patch in the area she is itching in. No other odd behaviors present, she is eating and moving around normally except for the itching.


Any idea of what that is and how to cure her?


Should I separate her from the other fish?|||it sounds like some sort of fungus or parasite.





the parasites include: worms and ich





fungus look like this(with all the fuzz)


http://www.americanaquariumproducts.com/鈥?/a>


Worms look like this:


http://home.infostations.net/letitiashen鈥?/a>


ich looks like this:


http://www.cosmos.com.sg/images/ich.jpg





to cure ich disease


http://www.cichlid-forum.com/articles/ic鈥?/a>





but i also suggest quick cure as the medication if you decide to have medicine included.





good luck!