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From what you have described, it seems to be a case of OCD (obsessive compulsion disorder) only. One thing I want to ask is whether it causes stress to your wife or does she consider her habits as alright. In case, we finally came to a diagnosis of OCD it requires proper treatment that is medications and psychotherapy. Pattern breathing exercises like Sudarshan Kriya will also help her. OCD can be cured if treatment is taken properly. Thank you.
The differential diagnosis is Probable diagnosis:
1. OCD.(obsessive-compulsive disorder)
2. OCPD (obsessive-compulsive personality disorder).
The probable diagnosis is OCD (obsessive-compulsive disorder).Treatment plan:
The treatment plan includes medications and behavior therapy.