Doctors may consider possibilities such as:
* Peripheral neuropathy
* Cervical spine problems
* Myasthenia gravis
* Multiple sclerosis
* Vitamin deficiencies
* Thyroid disorders
* Certain muscular diseases
* Other motor-neuron disorders
This is why searching symptoms online cannot provide a reliable diagnosis.
## When Should You See a Doctor?
Arrange medical evaluation if you develop **progressive and unexplained** symptoms such as:
* Increasing weakness in one arm or leg
* Repeated unexplained falls
* Persistent hand clumsiness
* Muscle wasting
* Twitching associated with weakness
* Progressive slurred speech
* Increasing difficulty swallowing
A neurologist may be needed if the symptoms suggest a motor-neuron problem.
## When Is It an Emergency?
ALS usually develops progressively rather than suddenly.
Seek emergency medical help if symptoms appear abruptly, particularly:
* Sudden weakness on one side
* Sudden facial drooping
* Sudden speech difficulty
* Sudden severe breathing problems
* Sudden inability to swallow
