So DH walked into a door handle last night

quite badly actually, and has got out the tiger balm (kinda like 'deep heat' for those of you who aren't familiar with it) and our house now smells of it to varying degrees!
Does anyone know if the vapours are harmful to any degree? There are warnings about not using it without prescription if you are pregnant or breastfeeding

but I'm wondering, if he puts it on before bed and Krystiana sleeps in our bedroom tonight, is that a problem?