Horner's syndrome

Symptoms of a disrupted nerve pathway from the brain to the face and eye on one side.

Horner's syndrome is the result of another medical condition, such as a stroke, tumor, or spinal cord injury.

Symptoms include a smaller pupil, drooping eyelid, and little or no sweating on the affected side.

There's no specific treatment for Horner's syndrome, but treatment for the underlying cause may restore normal nerve function.