If the left side of the brain is tingling, the main reasons are the following: 1. This may be the onset of migraine, which usually has certain triggers, such as staying up late, poor rest or cold stimulation, and is paroxysmal. 2. The nerve, when stimulated by cold or cervical spine compression, will lead to a stabbing pain on the left side of the brain, mainly on the left side of the back of the head. 3, the patient’s left brain stabbing pain should also be considered to be caused by herpes zoster, the pain level is more intense and can be observed in clusters of skin blisters.