Hello, My 16 year old son has numb hands, for almost 5 months, constant/not intermittant. EMG s show mild sensory changes and no motor weakness. Thyroid, B12, diabetes, (common causes) etc have all been tested repeatedly, and he is negative. Not heavy metals or HIV (or any sexually transmitted disease ) either. Spinal tap is normal. Neurologist tested spinal fluid to rule out a sensory form of CIPD or Guillen-Barre. It is not Carpal Tunnel either. MRI of brain and spine looks fine. PT was no help. Where do we look next? Thanks. Amy