Dear Fizzabelle,
Most probably your furkid got fungal infection. Yes it is very very itchy
.
Please take her to the nearest vet. I think there is a good vet in Nilai there.
You can check Muezza Veterinary Service No. B10-G19 Cempaka Puri Bandar Baru Nilai (06-8500645).They have an injection for fungal infection, that can release your furkid from the itchiness.
In the mean time you can add a little bit of Apple Cider Vinegar into the rinsing water, when giving her a bath.
If you have other furkids, please try not to mix them together, as they are highly contagious especially among kittens and young adults.
The cost will depend on the severity of the infection. Usually it will cost me about 60rm for the anti-fungal oral medication + some fish oil (for the hair to growback), and anti fungal liquid to be applied on the infected area.
It is better if you could buy the dermaleen (the anti-fungal shampoo) which usually cost about 25-27rm. it can be used for treatment and also to prevent your furkid from being infected the next time.