Learn the early symptoms of Lou Gehrig’s disease (ALS), including subtle muscle weakness, twitching, cramps, speech and swallowing changes, and when these symptoms warrant medical evaluation.
Lou Gehrig’s Syndrome: Here Are the First Symptoms of This Disease
Lou Gehrig’s disease, medically known as amyotrophic lateral sclerosis (ALS), is a progressive neurological disease that damages motor neurons—the nerve cells responsible for controlling voluntary muscles.
The earliest symptoms can be subtle and vary considerably from person to person. Importantly, having one of these symptoms does not mean someone has ALS. Many more common conditions can cause similar problems.
1. Muscle Weakness
One of the most common early features of ALS is gradually worsening muscle weakness.
It may initially affect one particular area, such as:
- A hand or arm
- A leg or foot
- The shoulder
- The muscles involved in speaking
Someone might notice difficulty turning a key, opening a jar, fastening buttons, climbing stairs, or lifting an object.
The weakness typically progresses rather than simply appearing for a few minutes and disappearing.
2. Muscle Twitching
Small, involuntary muscle movements called fasciculations can occur in ALS.
They may appear in the:
- Arms
- Legs
- Hands
- Shoulders
- Tongue
However, muscle twitching by itself is extremely common and can occur because of stress, fatigue, caffeine, exercise, medications, or other neurological conditions.
Therefore, twitching alone isn’t enough to indicate ALS.
3. Muscle Cramps and Stiffness
Some people experience painful muscle cramps or increased muscle stiffness.
The muscles may feel unusually tight, and movements can become less smooth.
When cramps or stiffness occur alongside progressive weakness or other neurological changes, a doctor may recommend further evaluation.
4. Changes in Walking or Balance
ALS can sometimes initially affect the muscles responsible for walking.
A person may notice:
- Frequent tripping
- Difficulty climbing stairs
- A foot that seems to catch on the ground
- Increasing difficulty walking
- Problems maintaining normal movement
A gradual decline in strength is more concerning than an isolated episode of stumbling.
5. Difficulty With Speech
When ALS affects muscles used for speaking, a person may develop slurred, slowed, or less clear speech.
This form of ALS is sometimes called bulbar-onset ALS.
Changes can initially be subtle, with family members noticing that the person’s speech sounds different before the person recognizes it themselves.
6. Difficulty Swallowing
Trouble swallowing can also occur when the muscles responsible for swallowing become affected.
Someone might cough while eating or drinking, have difficulty handling food in the mouth, or feel that swallowing has become unusually difficult.
Persistent or worsening swallowing problems should always be medically evaluated because there are many possible causes.
7. Changes in Fine Motor Skills
Early ALS can interfere with precise hand movements.
Everyday tasks such as writing, typing, using utensils, tying shoelaces, or handling small objects may gradually become more difficult.
Again, this symptom has many possible explanations, including nerve compression, arthritis, injuries, and other neurological disorders.
8. Muscle Wasting
As affected muscles become weaker, they may gradually become smaller.
This is known as muscle atrophy.
Visible muscle loss accompanied by progressive weakness is something a physician should investigate.
What Usually Isn’t an Early ALS Pattern?
ALS primarily affects motor function. Symptoms such as isolated numbness, tingling, significant pain, or loss of bladder control aren’t typical defining early features of ALS and can point toward other conditions.
That doesn’t mean such symptoms should be ignored—they simply shouldn’t automatically be attributed to ALS.
When Should You See a Doctor?
Make an appointment with a healthcare professional if you develop persistent or progressively worsening muscle weakness, unexplained muscle wasting, new speech or swallowing difficulties, or repeated problems with walking or coordination.
A doctor can perform a neurological examination and determine whether additional testing is appropriate.
There is no single test that establishes ALS on its own. Doctors generally consider the pattern of symptoms, neurological examination findings, and appropriate investigations while also ruling out other conditions that can produce similar symptoms.
A Final Reminder
ALS is a serious disease, but most muscle twitching, cramps, weakness, or balance problems are not caused by ALS.
The important warning sign is generally a progressive pattern of neurological problems, particularly weakness that continues to worsen rather than coming and going.
If someone develops sudden weakness, facial drooping, difficulty speaking, or other sudden neurological symptoms, that is different from the usual gradual presentation of ALS and can represent a medical emergency such as a stroke. Seek emergency medical care immediately.