Firstly, I have no idea what the distinction is between a sensory issue and a preference. Unless you mean something like 'I don't like tap water because I'm paranoid about toxins' or something like that.
Secondly, it sounds like some people here are getting confused between a sensory issue and a chemical sensitivity. If it causes psychological discomfort due to some sensory feature of the water (eg its taste or the feel of it on your skin or something) that's a sensory issue. (For example, I hate the way tap water tastes.)
If it causes physical health problems, that's some sort of medical issue, such as a chemical sensitivity or allergy or whatever. I'd consult a doctor about that, because it could be a bunch of different things, some of them serious. (For example, if you feel dizzy only from hot water, that could suggest low blood pressure, which could be a sign of a heart problem.)