my cat keeps peein outside the litter box but she used to be really good

Question
my 1 year old persian has recently started peeing outside
her litter box we have never had any problems with her shes
normally good with the litter box, the weird thing is she
does not pee every time on the floor only 1ce a day but she
will go in the litter box every other time and at night. i
dont know what to do about it, hopefully someone can help
thanks

Answer
Haylee,

The most common medical reason is that she may have a urinary tract infection or urinary crystals. Both are painful when they pee, and they associate that pain with the litterbox and go elsewhere.

There are many behavior possibilities, and since I cannot put all the information in this reply, I am including some links to good articles about improper elimination. Please read them. They will have good information that you should find helpful in dealing with the kitten's behavior.
(copy and paste or type the whole links into your address bar)

http://cats.about.com/cs/behavioralissues/a/outsidebox_two.htm

http://www.geocities.com/heartland/pointe/9352/litterboxhelp.html

http://www.apbc.org.uk/article10.htm

I hope this is helpful.
Tabbi