I have impaired sensation for touch on left face, left palm, left foot. it increases towards the fingers. it reduced a little bit, but lasts for 4 weeks. 6 months ago i had numbness on left face only,ct of head then was ok. what is cause and treatmen?

1) You need to see a neurologist 2) The brain perceives sensation in the sensory cortex. The odd thing is - the face and the body issues are on the same side - generally right side of brain perceives left side of body - below the neck (so face and body issues should be opposite). The CT scan may not have gone low enough in the posterior brain/upper spinal cord to detect an issue. 3) see #1