Pain is a major issue in the care of Multiple Sclerosis patients. It is present in more than half of the cases and it adopts many aspects, which frequently ruin the patients quality of life. Most of them do not receive appropriate treatments, as clinicians are more oriented towards controlling the immuno-pathogenic process of the disease than coping with symptomatic consequences of the lesions. Any clinical form of the disease may include pain and no clinical criteria have been correlated with the occurrence of pain: neither age, nor gender, nor MS subtypes nor severity of the handicap; almost all MS cases will complain of pain at a time or another of their evolution. A key issue is to make a precise diagnosis of the type or types of pain that any patient reports: is pain due to a central neuropathic or a nociceptive pathogenesis. Treatments will depend upon these two main pain mechanisms and will use different agents according to each type: antispastic, antiepileptic, anti-inflammatory, opioids.... Pain has to be taken in consideration in every MS patient and adapted treatment strategy must be prescribed.