Sometimes a specific injury can produce numbness or tingling, such as an injured nerve in your neck or a herniated disk in your spine. Placing pressure on a nerve is a common cause. Carpal tunnel syndrome, scar tissue, enlarged blood vessels, infection, or a tumor can all place pressure on a nerve.
The symptoms will vary from person to person and individuals may have different symptoms during different attacks. Your attacks may differ in length and frequency. Migraine attacks usually last from 4 to 72 hours and most people are free from symptoms between attacks.
Usually between 20-40 minutes before the migraine begins. Migraine and aura are linked so that many sufferers have more aura symptoms during the migraine as well. Some even get aura without the actual migraine pain (silent migraine or migraine aura without headache)! Whatever the case, the same treatments will probably need to be investigated.