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Itching and blurred vision can be caused by many different things. Allergies can cause blurred vision and itching of the eyes or skin on the back of the head.
Herpes simplex virus 2 (HSV-2) is most often known for causing a recurrent rash in the genital area, but rarely it can also cause neurological symptoms, even without any sign of a skin rash. These symptoms may include double vision, a problem I have recently experienced. I have also felt really pronounced itchiness on the back of the head just above the neck. This is such an unusual combination of symptoms, I am wondering if the person who asked this question is also experiencing a rare case of neurological complications of HSV-2. Treatment with antiviral medication such as Valtrex can help.
