Mildew, caused by dampness.  Clean with mask and gloves with bleach water.  Find the moisture and fix the problem.

Not really sure but I think alcohol is a blood thinner and maybe that is why

It is elevated slightly but not really risky.  Could it be a stress factor or caffeine or something of that nature.  What I mean is, is it constantly elevated or just on occasion

Olive oil in your hair, place a shower cap on. Leave over night or at least 8 hours.  That will do the trick.

You could bathe your dog is a medicated colloidal oatmeal shampoo for dogs,just don't bathe it often.  You also might try allergy meds for babys.

I have a yorkie too, and they often have very dry skin. A medicated shampoo maybe once a month may help, not too often though, bathing will aggravate dry skin on dogs.  Also it is possible she has allergies, in which case your vet can prescribe meds.