Lou Gehrig’s syndrome is the common name for amyotrophic lateral sclerosis (ALS) , a progressive neurodegenerative disease that affects nerve cells (motor neurons) in the brain and spinal cord. It was named after the famous baseball player Lou Gehrig, who was diagnosed in 1939.
ALS leads to loss of muscle control, and early symptoms can be subtle, often mistaken for other conditions. Below are the first symptoms, organized by how they typically present.
Early Symptoms of ALS (Lou Gehrig’s Disease)
ALS symptoms usually begin focally (in one specific area of the body) and then spread. There are two main ways it starts:
1. Limb-Onset ALS (most common — about 70–80% of cases)
First symptoms appear in the arms, hands, or legs.
Arms/hands:
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Weakness or clumsiness in one hand — dropping things, difficulty buttoning a shirt, turning a key, or writing
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Muscle twitching (fasciculations) in the shoulder, arm, or hand
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Cramping or stiffness in hand or arm muscles
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Loss of dexterity — trouble with fine motor tasks
Legs/feet:
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Dragging one foot (foot drop) — catching a toe while walking
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Tripping or stumbling more often than usual
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Weakness in one leg when climbing stairs or getting out of a chair
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Twitching or cramping in calf muscles or thighs
2. Bulbar-Onset ALS (about 20–30% of cases)
First symptoms affect muscles of the face, mouth, and throat (bulbar region).
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Slurred or nasal-sounding speech (dysarthria) — may sound like they’re drunk or have a thick tongue
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Difficulty chewing or swallowing (dysphagia) — choking on liquids or food, coughing while eating
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Changes in voice — hoarseness or reduced volume
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Excessive yawning or jaw cramping
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Emotional lability (sometimes early) — inappropriate laughing or crying
Less Common Early Presentations
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Respiratory-onset (rare): Shortness of breath with minimal exertion, waking up at night due to difficulty breathing, morning headaches (from CO₂ retention) — often mistaken for lung disease or anxiety.
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Cognitive/behavioral changes: Up to 15% of ALS patients show early frontotemporal dementia (FTD) symptoms — personality changes, apathy, poor judgment, or loss of social filters.
What Early ALS Does Not Typically Include
| Symptom | Unlikely in early ALS | More likely other cause |
|---|---|---|
| Numbness or tingling | Yes (ALS is motor-only initially) | Peripheral neuropathy, pinched nerve |
| Loss of bladder/bowel control | Yes | Multiple sclerosis, spinal cord issue |
| Eye movement problems | Yes (eyes are usually spared) | Myasthenia gravis, MS |
| Pain as a first symptom | Possible but not prominent | Arthritis, radiculopathy |
| Vertigo or double vision | Yes | Stroke, inner ear disorder |
Who Is at Risk?
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Age: Most common between 40–70 years (average onset ~55)
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Gender: Slightly more common in men before age 65; equal after
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Family history: 5–10% of cases are familial (genetic mutations: C9orf72, SOD1, TARDBP, FUS)
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Military veterans: Approximately 2× higher risk (cause unknown)
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Geographic clusters: Western Pacific (Guam, Kii Peninsula) had higher historic rates
How Is ALS Diagnosed?
No single test confirms ALS. Diagnosis is clinical and requires:
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Progressive weakness spreading to other body regions
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Both upper motor neuron signs (spasticity, hyperreflexia) AND lower motor neuron signs (weakness, atrophy, twitching)
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Exclusion of other diseases via:
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EMG (electromyography) – shows denervation
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MRI of spine/brain – rules out structural lesions
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Blood tests (rule out Lyme, vitamin deficiencies, thyroid disease)
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Lumbar puncture (sometimes)
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Average time from first symptom to diagnosis: 10–18 months
Why Early Recognition Matters
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Earlier access to disease-modifying therapies (Riluzole, Edaravone, Tofersen for SOD1 mutation)
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Better timing for non-invasive ventilation (which prolongs survival)
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Opportunity to participate in clinical trials
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Time for advanced care planning (living will, speech banking, mobility aids)
Common Early Misdiagnoses
| ALS First Symptom | Often Misdiagnosed As |
|---|---|
| Foot drop | Peroneal nerve palsy, herniated disc |
| Hand weakness | Carpal tunnel syndrome, cervical radiculopathy |
| Slurred speech | Stroke, myasthenia gravis, intoxication |
| Swallowing difficulty | GERD, esophageal stricture, anxiety |
| Muscle twitching | Benign fasciculation syndrome, anxiety, overexertion |
Red flag: If a patient has been diagnosed with carpal tunnel or a pinched nerve but isn’t improving with standard treatment, ALS should be reconsidered.
What to Do If You Notice These Symptoms
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See a primary care doctor first to rule out common causes (vitamin deficiency, thyroid, diabetes, nerve compression).
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Ask for a neurology referral if weakness or speech changes persist without explanation.
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Don’t panic — most muscle twitching and mild weakness are not ALS. Benign causes are far more common.
Prognosis & Support
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Median survival: 2–5 years from symptom onset
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10% live 10+ years (Stephen Hawking lived 55 years with a very slow-progressing form)
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Leading cause of death: Respiratory failure (due to diaphragm muscle weakness)