Skin feels like sun burnt. palms of hands and soles of feet have tight sensation. right arm aches.numbness feeling left torso &legs. mri normal. ms?

Anxiety: Anxiety symptoms are not a sign of illness, they are the mind's ability to produce the "flight or fight" response which gives rise to many physiological changes include chest pains, parasthesia (pins and buzzing feeling), dry mouth, aphasia, tremor and sweating. Depending on the cause of your anxiety symptoms, your health care provider can recommend appropriate treatment.

Skin tightness: MS is a neurologic condition in which symptoms are separated in time and space. Your symptoms do not sound like MS and your MRI was negative. If your neurologist is suspicious of MS, a spinal tap may also be diagnostic. You may also consult a dermatologist regarding possible dermatosclerosis. Otherwise, your doctor may need to perform a physical including serology for thyroid dysfunction.