in doubt, don't do. Want to do, don't think about it. I didn't for my two kids and my head was half white by the time I gave birth. However, I did dye, rebond during confinement. Nothing must happened to my kids so I do not take the risk. However, I am willing to suffer (touching water during confinement will result air going to body and later here pain there pain) for the sake of beauty. Lol.