First of all, you have to stop the skin allegy first. You can try 'Physiogel' which has cleanser and cream / lotion. It's tailor made for sensitive skin. I've used it and it's nice and very cost effective.
It can be easily bought from any chemists (藥房) in Hong Kong. It's also dermotogist recommended. The cleanser its only around $70 and the cream is similar price.