Brain & Nerves

Where ordinary memory lapses end and warning signs begin, the reversible causes worth excluding first, and why early assessment is worth doing.

Pins and needles have dozens of causes, from a trapped nerve to B12 deficiency. The pattern of where it happens tells you most of what you need to know.

How to recognise migraine, why timing matters more than dose, the overlooked trap of medication overuse headache, and the newer preventive drugs.