I'm only in the 1st trimester and your comments have been really helpful for me. Today I had a headache and rather than take painkillers (trying to stay drug-free) I had a chinese massage, where they used Tiger Balm. After the event I went into a bit of a panic thinking about the possible effect of the Tiger Balm. The most problematic ingredient seems to be the camphor and I've since found so much conflicting evidence on the web... some sites saying that it is toxic should and be banned (for everyone), but then it's also found in VapourRub type products which have been used safely for decades (and aren't banned). The scientific based information that I found said that whilst it will affect your blood-flow (drawing to the surface or the skin) there is no proof that it's related to birth defects & the amount taken in through the skin is probably too small. That being said, I think I'll play it safe and avoid it in the future.