I hope that this is not what he has. From Wikipedia:
Signs and symptoms
Main article: Multiple sclerosis signs and symptoms
The person with MS can suffer almost any neurological symptom or sign, including changes in sensation such as loss of sensitivity or tingling, pricking or numbness (hypoesthesia and paraesthesia), muscle weakness, muscle spasms, or difficulty in moving; difficulties with coordination and balance (ataxia); problems in speech (dysarthria) or swallowing (dysphagia), visual problems (nystagmus, optic neuritis including phosphenes,[13][14] or diplopia), fatigue, acute or chronic pain, and bladder and bowel difficulties.[1] Cognitive impairment of varying degrees and emotional symptoms of depression or unstable mood are also common.[1] Uhthoff’s phenomenon, an exacerbation of extant symptoms due to an exposure to higher than usual ambient temperatures, and Lhermitte’s sign, an electrical sensation that runs down the back when bending the neck, are particularly characteristic of MS although not specific.[1] The main clinical measure of disability progression and symptom severity is the Expanded Disability Status Scale or EDSS.[15]
Crud! I wish you hadn’t posted that, I have most of those symptoms.