Hi, I am 36 and I have suffered from itching after showers since I was about 20. I have noticed being sun burnt stops the itching but that's hardly a good way to prevent itching. After lot's of trial and error I have come to the conclusion that lotions and shower gels make no difference, what I've noticed that helps is hot baths instead of showers (someone else mentioned try having hot showers) For me the colder the bath or shower the more I itch afterwards but if I have a hot bath this usually helps. Hot showers help too but not as much. Not sure about the diet thing, not tried