I just administered my first treatment of Avonex yesterday and I felt fine until I had ice cream. I had chills for two to three hours shivering violently in bed under three blankets. Then, my arm and leg went numb. Now, I know that MS likes to attack my right arm and leg when it shows up. I don't know what could have triggered this numbness after the Avonex but my right arm and my thumb and two end fingers are still numb. How are you doing now? Has your numbness gone?