Liv Hospital provides rapid diagnosis and advanced neurological care for Flaccid Myelitis, ensuring early intervention and child-focused support.
Send us all your questions or requests, and our expert team will assist you.
What Are the Early Warning Signs of Acute Flaccid Myelitis (AFM)?
Acute Flaccid Myelitis (AFM) is a neurological emergency characterized by the sudden onset of flaccid (floppy) muscle weakness. Because the condition affects the gray matter of the spinal cord, specifically the area that sends signals to the muscles, the symptoms are primarily motor related. Unlike many other neurological issues that develop slowly over months, AFM is aggressive and can progress from mild weakness to full paralysis within a matter of hours or days.
Recognizing these symptoms in the acute phase is life saving. Most cases of AFM occur between August and November, often following a common respiratory illness. While the initial viral symptoms may seem routine, the neurological second wave is what defines AFM.
The most common and significant symptom is the sudden onset of weakness in one or more limbs (arms or legs). This is not a general feeling of being “tired”; it is a functional loss where the child may suddenly struggle to lift their arm, hold a cup, or walk without stumbling.
Loss of Deep Tendon Reflexes
In a healthy child, a tap on the knee or elbow results in a quick, involuntary kick or jerk (reflex). In AFM, these reflexes diminish or disappear entirely in the affected limbs.
Cranial Nerve Dysfunction and Facial Droop
While AFM targets the spinal cord, it can also affect the brainstem, which controls the muscles of the face and head.
Bulbar Symptoms: Swallowing and Speech
When the nerves controlling the throat are affected, it leads to “bulbar symptoms.” These are extremely dangerous as they affect the child’s ability to protect their airway.
Respiratory Failure (The Most Severe Complication)
If the inflammation in the spinal cord reaches the upper cervical levels (C3, C4, and C5), it can paralyze the diaphragm—the primary muscle used for breathing.
Sensory Abnormalities: Pain and Numbness
Although AFM primarily affects motor nerves, many children report sensory symptoms just before or during the onset of weakness.
Autonomic Dysfunction
The nervous system also controls involuntary functions like heart rate, blood pressure, and temperature.
Bowel and Bladder Issues
Damage to the lower segments of the spinal cord can disrupt the signals that control the bladder and bowels.
Neck and Back Pain
In the days leading up to the weakness, many children complain of significant stiffness or pain in the neck and spine.
The "Viral Prodrome" (The Preceding Illness)
AFM rarely appears out of nowhere. Almost 90% of patients report a viral illness roughly 1 to 2 weeks before neurological symptoms begin.
The Transition: The “Prodrome” ends, the child seems to get better for a few days, and then the sudden limb weakness strikes—this “biphasic” pattern is a classic sign of AFM.
Associated Conditions and Differential Diagnosis
Because AFM is rare, it is often misdiagnosed as other neurological conditions:
Why Choose Liv Hospital for Acute Flaccid Myelitis Care?
At Liv Hospital, every case of sudden limb weakness is treated as a neurological emergency. Our Pediatric Neurology Team rapidly evaluates early signs of Acute Flaccid Myelitis and closely monitors respiratory or bulbar weakness.
If needed, children are immediately transferred to our advanced Pediatric ICU. We act quickly to prevent complications and begin treatment from the very first moment.
Send us all your questions or requests, and our expert team will assist you.
Yes. AFM can start in one limb and quickly spread to others or breathing muscles. Close monitoring in the first 48–72 hours is critical.
No. The initial viral illness may include fever, but it often resolves before weakness begins.
It varies. Some children recover well; others may have lasting muscle atrophy. Early, intensive therapy improves outcomes.
AFM affects lower motor neurons, causing loss of muscle tone and a flaccid appearance.
