I had a headache for eight years. After, my mother mentioned that Aspartame gave her migraines; I stopped drinking diet Coke (I drank about 2 per day).
The headache went away. I had always assumed that the headache was from my allergies. The last time I had Aspartame, I unknowingly consumed it (it was at an ice cream shop) in a blizzard-like thing. I wound up in the Dr’s office with one of the worst migraines that I have ever had. Now, I wouldn’t go near the stuff.