Our expert says:
This is definitely OCD, which fortunately responds well to treatment. ITs not clear why it sometimes comes on so rapidly or at this particular time, but its usually not fruitful to pursue those questions. From the sound of this, it grew on a basis of a pre-existing strong concern about hygiene, which then grew way out of proportion.
Some medications, such as those also used to treat depression, can be very helpful ( and there's often an element of depression along with OCD ) ; and the only specific variety of counselling shown to help OCD would be Cognitive-Behaviour Therapy ( CBT ).
The chronic itching is not usually part of OCD, and you'd need to see at least a GO, and preferably a Dermatologist to check this out. Personally, I very strongly suspect it is caused by your excessive washing and excessive exposure to so many unnecessary antiseptic and "anti-germ" chemicals. And also if you use, as you describe unnecessarily making your daughter use, fragrances and deodorants. Fragrances are very common causes of skin irritation, and not beneficial at all.
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