no infection or illness or injury" could "bring on an exacerbation but you don't have to have ant other health issues going on at the same time as one.i have had them for no apparent reason but in learning my m.s. me i now know that i have brought allot on myself.i live in vegas and can't seen to be able to stay in my house for 6 months out of the year and heat deffinately brings them on.also as soon as i'm feeling better i try a different workout programs or try to sweep and mop my house(all tile) and wham down i go so i know that physical exhsertion also brings them on for me.it could be different for you.keep track of when your feeling bad and what is going on before so you can learn your m.s. you

No, really---a relapse or flare up is unpredictable. A fever could certainly cause a "pseudo" attack and an infection would stress your body. But no, absolutely not.

thank you for your response.
my last attack happened when I had a cold. today my neuro's nurse called and said I dont have a uti like we thought I might. she made me feel like If I dont have an infection Im not haveing a relapse. she schudled me for friday to see my neuro so we can figure out what is going on with my weak left side. it's been this way for two weeks now and for the last three days half of my left hand has been numb.
thanks again.
april