Its not just the water if you filter it or soften it somehow its said to be better if your in a hard water area and get rid of the cholorine etc. shampoos and other in the UK are i am led to belive different for the various areas of the country.
if you cant sleep read this
http://en.wikipedia.org/wiki/Hard_water
Your hubby should know what the water is like you can tell by looking at the taps in hard areas you get a bulid up of white scale over time.
The other reason is humidty.
All us brits and phills who return to the land of balut will notice with in days our hair and skin change.
I have read on many sites and from seeing and hearing how my wife and her friends were affected by the change getting the right treatment is vital.
Us blokes dont notice but i know its very destressing what with all the other things going on.
Dont forget to visit your local phill shop for the products that you know it helps my wife as she is addicted to her papaya soap