I had highlights and color recently, and about 10 days later was very nauseous and sick. The sickness lasted about 15 hours, but it took a while for my digestive system to return to normal. I'm just not sure if it was the color or the excessive garlic I had the night before I was sick. Lol... I hope it wasn't the color. :(
Im not sure what to think. I have very sensitive skin, yet had no adverse reactions to the color. I don't however, have a sensitive stomach. I started to feel sick about 6-8 hours after I ate, which I think is the normal timeframe for food poisoning. I would think that if it was the color it would have affected me sooner than 10 days, but who knows. I'll need a touch up soon, but am not sure whether to make an appointment or not?
Anything that we put into our skin is absorbed into our blood stream, but I think that dye would have to be VERY strong to make you feel ill immediately. After all, even some doctors say that pregnant women can color their hair. If there was a high risk of it causing illness, it would be completely taboo across the board- like drinking alcohol, for example.
Definitely see a doctor, if you have concerns. Hope you feel better soon!