Hello and welcome to HCM,
In a person with constant thirst, frequent urination
, skin dryness (probably from dehydration
secondary to frequently urinating) and preference for sugar things like soda pops rather than water, Diabetes
should be rulled out.
Also the fact that he is always cold should prompt us to rule out a thyroid disorder
(hypothyroidsim) which may also explain the dry skin and snores.
A thorough medical examination and laboratory work-up by Internal Medicine physician or an Endocrinologist
, will help us tell what the problem is and permit appropriate management.
Permit me congratulate you for being so observant about your partner's health. He is a lucky guy :-)
Cheers and best wishes.