Small fiber sensory neuropathy

SFSN is a disorder in which only the small sensory cutaneous nerves are affected.
Sensory disturbances start in the feet and progress upwards. These patients have what is called a length-dependent SFSN.

Unusual sensations such as pins-and-needles, pricks, tingling and numbness
Burning pain
Coldness
Electric shock-like brief painful sensations
It does not involve large sensory fibers that convey balance information to the brain or the motor nerve fibers that control muscles, these patients do not have balance problems or muscle weakness.
In most patients, these symptoms start in the feet and progress upwards.
In advanced cases, it may involve the hands.

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