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Knowing when to see a neurologist can prevent complications and speed recovery. This article explains the key warning signs of nerve or brain problems—sudden weakness or numbness, severe or new headaches, changes in vision, speech, or balance, seizures or tremors, memory or thinking issues, and persistent tingling, pain, or back/neck symptoms that radiate into a limb—and flags emergencies like possible stroke (face droop, arm weakness, speech trouble: call emergency services). It also outlines what to expect at an appointment, including a neurological exam and tests such as MRI/CT, EEG, or EMG, and the range of conditions neurologists treat, from migraines and neuropathy to epilepsy and multiple sclerosis. Patients and caregivers will find practical tips for tracking symptoms, preparing questions, and seeking timely referrals, with reassurance that early evaluation leads to safer, tailored care and better outcomes.