Neurologists diagnose and treat conditions affecting the brain, spinal cord, and nerves throughout the body. Their scope is broad, covering everything from common migraines and pinched nerves to complex conditions like epilepsy, multiple sclerosis, and Parkinson’s disease. Unlike neurosurgeons, neurologists don’t operate. They manage conditions through medication, diagnostic testing, and long-term care plans.
Headaches and Migraines
Chronic headaches are one of the most common reasons people end up in a neurologist’s office. While occasional headaches rarely need specialist care, migraines that strike frequently or don’t respond to over-the-counter treatment often do. Neurologists can prescribe preventive treatments that reduce how often migraines happen and how severe they are. For chronic migraine (15 or more headache days per month), options include Botox injections every 12 weeks and newer medications that block a chemical messenger called CGRP, given as monthly or quarterly injections.
Neurologists also evaluate headaches that raise red flags: a sudden, severe headache unlike anything you’ve experienced before, headaches that start after age 50, headaches triggered by coughing or exertion, or headaches accompanied by fever, vision changes, or neurological symptoms like weakness or confusion. These patterns can signal something more serious, like bleeding in the brain or a tumor, and a neurologist can determine whether imaging or further testing is needed.
Epilepsy and Seizure Disorders
Seizure disorders are a core part of neurological practice. When epilepsy is diagnosed, the neurologist typically starts with a single anti-seizure medication, adjusting the dose until seizures are controlled or side effects become a problem. If the first medication doesn’t work, they’ll try a second one before combining drugs. The goal is always to stop seizures while keeping side effects manageable enough that you can live a normal life.
For people whose seizures don’t respond to medication, neurologists can refer for surgery to remove the area of the brain causing seizures, recommend vagus nerve stimulation (a small device implanted under the skin that sends electrical signals to the brain), or try specialized diets. The diagnostic workup often involves an EEG, which monitors the brain’s electrical activity through sensors placed on the scalp. This test helps pinpoint where seizures originate and what type they are.
Stroke
Stroke is a medical emergency, and neurologists play a central role in acute treatment. For ischemic strokes (caused by a blood clot blocking blood flow to the brain), a clot-dissolving medication can be given intravenously if the patient arrives within 4.5 hours of symptom onset. In cases where a large artery is blocked, a procedure called mechanical thrombectomy can physically remove the clot. After the acute phase, neurologists manage recovery, monitor for complications, and work to prevent a second stroke through medication and risk factor management.
Neurodegenerative Diseases
Neurologists manage the long arc of progressive brain diseases, including Alzheimer’s, Parkinson’s, and ALS (amyotrophic lateral sclerosis). None of these conditions currently have a cure, but neurological care focuses on slowing decline and preserving quality of life for as long as possible.
For Alzheimer’s disease, newer immunotherapy treatments targeting the protein plaques in the brain have shown some ability to slow cognitive decline, though benefits are limited once dementia is well established. For Parkinson’s disease, treatment centers on controlling symptoms like tremor, stiffness, and slow movement through medication, along with lifestyle modifications such as exercise and physical therapy. No drug has been proven to slow Parkinson’s progression itself. ALS care is largely supportive: neurologists coordinate tools like brain-computer interfaces that help patients communicate as muscle function declines, and they manage symptoms to maintain comfort.
Multiple Sclerosis
Multiple sclerosis (MS) is a condition where the immune system attacks the protective coating around nerve fibers, causing communication problems between the brain and body. Neurologists are the primary specialists managing MS, and the treatment landscape has expanded significantly. The FDA has approved 22 disease-modifying therapies, available as pills, self-injections, or IV infusions given at a clinic. These medications don’t cure MS, but they reduce the frequency and severity of relapses and can slow the accumulation of disability over time. For progressive forms of MS, where disability worsens steadily rather than in distinct relapses, specific therapies have been approved as well.
Beyond prescribing medication, neurologists monitor MS through regular MRI scans and neurological exams, adjusting treatment if the disease shows signs of activity despite therapy.
Neuromuscular Disorders
Conditions affecting the nerves and muscles fall squarely within neurology. Peripheral neuropathy, which causes numbness, tingling, or pain in the hands and feet, is extremely common and can result from diabetes, alcohol use, toxic exposures, or immune system problems. A neurologist identifies the underlying cause and treats accordingly. Alcoholic neuropathy, for instance, improves slowly with reduced drinking. Toxic neuropathies require identifying and removing the source.
Guillain-Barré syndrome, a sudden-onset condition where the immune system attacks peripheral nerves, is treated with intravenous immunoglobulin or plasma exchange to dampen the immune response. Myasthenia gravis, which causes fluctuating muscle weakness that worsens with activity, is another autoimmune condition neurologists diagnose and manage. Diagnosis sometimes involves giving a short-acting medication that temporarily improves strength, confirming the problem is at the nerve-muscle junction.
Sleep-Related Neurological Conditions
Some sleep disorders have neurological origins. Narcolepsy, which affects roughly 25 to 50 people per 100,000, causes uncontrollable episodes of falling asleep during the day. One form also involves cataplexy, a sudden loss of muscle tone triggered by emotions like laughter or surprise. Neurologists diagnose narcolepsy through sleep studies and sometimes by measuring levels of a brain chemical called hypocretin in spinal fluid.
Restless legs syndrome (RLS) is one of the most common neurological conditions, affecting 6% to 9% of the population, with women affected roughly twice as often as men. It causes uncomfortable sensations in the legs and an overwhelming urge to move them, especially at rest in the evening. Neurologists diagnose it based on four key features: unpleasant leg sensations with an urge to move, symptoms that appear during rest, relief with movement, and worsening in the evening or night. About 0.5% to 1% of the general population needs medication to manage it.
How Neurologists Diagnose Conditions
Neurologists rely on a combination of physical examination and specialized testing. The neurological exam itself is detailed: checking reflexes, muscle strength, sensation, coordination, balance, vision, and mental status. Based on what they find, they order targeted tests.
An EEG records the brain’s electrical patterns and is essential for diagnosing seizure disorders and evaluating other conditions affecting brain activity. EMG and nerve conduction studies work together to assess nerve and muscle function. The EMG records electrical activity in muscles using a small needle, while the nerve conduction study measures how fast and how strongly electrical signals travel through nerves. Together, they help diagnose conditions like carpal tunnel syndrome, neuropathy, and motor neuron diseases like ALS.
A lumbar puncture (spinal tap) involves collecting a small amount of the fluid surrounding the brain and spinal cord. This fluid can reveal evidence of infection, bleeding, MS, and various metabolic conditions. Neurologists also rely heavily on brain and spine imaging, particularly MRI, to look for tumors, strokes, MS plaques, and structural abnormalities.
How Neurologists Differ From Neurosurgeons
The distinction is straightforward: both treat the nervous system, but neurosurgeons operate and neurologists don’t. When you’re referred for neurological symptoms, your first evaluation is typically with a neurologist. They’ll order imaging and other tests to identify the problem. If a structural issue like a brain tumor is found, they refer you to a neurosurgeon for the surgical piece while continuing to manage the medical side. For conditions like brain tumors, the two specialists often work as a team, each handling different aspects of care.