Smoking is also linked to worsening of psoriasis. In an Italian study, people with psoriasis who smoked 20 cigarettes a day had twice the risk of more severe symptoms than those who smoked less than 10 cigarettes a day. The effects were more pronounced among women than men, the researchers found.
To learn more about multiple sclerosis, visit the National Multiple Sclerosis Society.
SOURCES: Bianca Weinstock-Guttman, M.D., associate professor, neurology, and director, Baird MS Center and Pediatric MS Center of Excellence, Jacobs Neurological Institute, State University of New York at Buffalo; John Richert, M.D., executive vice president, research and clinical programs, National Multiple Sclerosis Society, New York City; Aug. 18, 2009, Neurology