What could be a trigger factor of multiple sclerosis ms?

Many perhaps: We are not aware of the full cause of ms, but know that hot ambient temperatures can make symptoms far worse, and even cause new brain lesions. Infections can clearly worsen the disease, and viral infections can influence relapses. Some drugs, such as cipro, (ciprofloxacin) have worsened the disease. Ongoing stress may also affect ms. Injury effects are contraversial, but may have some influence.