I have an intense itch on arms and neck (worse at night. Have had all sorts of treatment, scabes, skin scraping (pathology), creams, medication. What now? Thax

Paresthesia. Chronic paresthesia is often a symptom of an underlying neurological disease or traumatic nerve damage. Paresthesia can be caused by disorders affecting the central nervous system, such as a tumor or vascular lesion pressed up against the brain or spinal cord can also cause paresthesia. Nerve entrapment such as a neck injury often causes such a condition. Get an MRI of neck.