Yes, you can relax flat ironed hair. My hair never turned out stick straight because of it. (But if I leave the relaxer on too long it turns out bone straight)
You could also relax it the other way.
I can't say that if it is healthier to do one or the other though.
I can say this... I know I definitely would not flat iron my hair and then 5 minutes later put a relaxer on it. That just doesn't seem right. Might be too much too soon for my hair.
Now if you flat iron and wait a few days before you relax, that would be alright, IMO. Since you did it a few days ago, I think it will be fine.
Edited by Phoenix1017 - Jan 27 2010 at 6:04pm