Recognizing the Signs and Symptoms of ALS
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Medically reviewed by Trevor Logan, M.D., Ph.D.
Most people experience an occasional eyelid flutter, muscle cramp or post-workout spasm. These symptoms are usually temporary and often have common explanations such as fatigue, stress, exercise or dehydration. However, persistent and progressively worsening weakness, especially when it begins to interfere with movement, speech or everyday tasks, should be evaluated by a healthcare professional. Learn about the possible signs of amyotrophic lateral sclerosis, or ALS, and when to seek medical care.
“Occasional muscle twitching is common and, by itself, usually does not indicate ALS,” says Trevor Logan, M.D., Ph.D., a board-certified neurologist and clinical neurophysiologist at INTEGRIS Health Medical Group Neurology Baptist.
“What concerns me more when considering ALS is progressive weakness or a loss of function, such as increasing difficulty walking, using the hands, speaking or swallowing. Anyone noticing these changes should speak with a healthcare provider for an evaluation.”
What is ALS?
The basics: Amyotrophic lateral sclerosis, often called Lou Gehrig’s disease, is a progressive nervous system disease that affects nerve cells in the brain and spinal cord. It causes loss of muscle control, but understanding the mechanics helps demystify the diagnosis.
- The disease attacks the motor neurons responsible for controlling voluntary muscles.
- ALS is progressive, meaning symptoms get worse over time.
- Many of the early symptoms of ALS are easily overlooked because the onset can be gradual.
Motor neurons gradually degenerate and die, causing the muscles they control to weaken and waste away. When these neurons die, the brain loses its ability to initiate and control muscle movement.
- Voluntary muscle action becomes increasingly difficult.
- Many people with ALS remain mentally alert and retain their memory and understanding. However, some people experience changes in language, behavior or decision-making.
- Eventually, people with the condition can lose the ability to perform daily activities like walking, speaking and eating.
What are the first signs of ALS?
Early signs of ALS may include gradually worsening muscle weakness, hand clumsiness, tripping, foot drop, muscle cramps or twitching and changes in speech or swallowing. Symptoms vary, but progressive weakness and loss of function are key reasons to seek medical evaluation.
What to watch for: Recognizing ALS symptoms early can be tricky because they often start gradually and can vary greatly from person to person. One person might have trouble grasping a pen, while another might notice a change in their speech pitch.
- Limb onset affects arms or legs first.
- Bulbar onset starts with speech or swallowing difficulties.
- Symptoms often begin on one side of the body before spreading.
Muscle twitching and cramps
Muscle twitching, also called fasciculations, may occur, but twitching alone is common and does not necessarily indicate ALS. A more concerning pattern is twitching accompanied by worsening weakness, muscle loss or difficulty completing familiar tasks.
- It can occur in the arm, leg, shoulder or tongue.
- Twitching is typically not painful but can be annoying and distracting. This isn’t just a random spasm but a persistent ripple under the skin that happens when the muscle is at rest.
- Fasciculations can occur when communication between motor neurons and muscles is disrupted. However, muscle twitching has many possible causes and is not enough by itself to diagnose ALS.
Muscle atrophy and weakness
As motor neurons deteriorate, the muscles they control receive fewer signals. This can cause progressive weakness and visible muscle wasting or shrinking, known as atrophy. You might realize you are tripping over carpet edges more often or that buttoning a shirt has become a frustratingly difficult task.
- Weakness often affects the hands and feet first, but progression differs from person to person and ALS symptoms do not occur in one standard sequence.
- You may experience “foot drop,” making it hard to lift the front of your foot.
- Daily tasks like turning a key or opening a jar become challenging.
Changes in speech or swallowing
For some people, especially those with bulbar-onset ALS, early symptoms may include progressively slurred, slowed or nasal-sounding speech. Others first notice weakness in a hand, arm, leg or foot.
- Speech may become slower or harder to understand.
- People might ask if you have been drinking or are exhausted.
- This can eventually progress to difficulty projecting your voice, along with difficulty chewing and swallowing.
Worried that muscle twitching could be ALS?
Occasional muscle twitches, weakness or fatigue have far more common explanations than ALS. The following symptoms are less likely to indicate ALS:
- Occasional twitching without progressive weakness
- Temporary soreness after exercise
- Symptoms that improve with rest
- Sensory symptoms such as numbness or tingling, which are not typical defining features of ALS
Important reminder: Health anxiety around ALS is common, partly because its early symptoms overlap with many everyday conditions. Understanding those overlaps and practicing a few grounding strategies can help reduce the fear that comes with uncertainty.
- Online symptom searches can sometimes increase uncertainty and anxiety because many conditions share similar symptoms. A healthcare provider can evaluate the complete pattern and help determine whether testing is needed.
- Talking to a trusted friend, family member or mental health professional can help break the cycle of worry. If anxiety is significantly affecting your daily life, speaking with a healthcare provider is a reasonable and important step.
When to talk to your doctor about ALS
When to seek help: Knowing when to seek medical advice can feel tricky, but a few clear signs suggest it's time to make an appointment. Your primary care provider can help assess your symptoms and, if needed, refer you to a specialist like a neurologist.
- Persistent muscle weakness that doesn't improve with rest calls for a conversation with your doctor.
- Slurred speech, difficulty swallowing or changes in your voice that come on gradually are worth reporting.
- Muscle cramps or twitching that are frequent and don't have an obvious cause, like exercise or dehydration, may need evaluation.
- If your symptoms are worsening over time rather than staying the same, that pattern is important to share with a healthcare provider.
Call 911 for sudden symptoms: ALS symptoms generally develop gradually. If slurred speech, facial drooping, weakness, numbness, confusion, vision changes or trouble walking begins suddenly, call 911. These may be signs of a stroke.
Talk to a doctor about persistent weakness or coordination changes
Take the next step: If you are experiencing persistent or worsening weakness, changes in coordination or difficulty speaking or swallowing, start by talking with your primary care provider. If specialized evaluation is needed, the neurological team at INTEGRIS Health can help identify the cause and guide you toward appropriate care.
Find a doctor at INTEGRIS Health to discuss your concerns.
