The most common precursor of stroke in the elderly is transient ischemic attack. The symptoms of transient ischemic attack are diverse and mainly include the following: 1) sudden onset of dizziness, unsteadiness, dizziness and headache; 2) patients have transient inflexible speech and difficulty in finding words; 3) patients suddenly have difficulty in remembering things and cannot remember the names of acquaintances, which lasts for a period of time and then relieves; 4) The patient has sudden onset of weakness and numbness of one limb, which is relieved after a few minutes; 5. The patient suddenly has a transient blackness or darkness in front of the eyes. All the above symptoms are caused by transient ischemia in the brain, which is often a precursor to stroke, so you must go to the neurology department of the hospital immediately to prevent the occurrence of stroke through medication.