C.C.
Hi K. - I'm not sure what the "burn" marks are - maybe something to run past your doc. Does your OB know that you're losing weight and having trouble keeping food down? There are medications like Phenergan that really knock out the nausea. I took them when my nausea was so horrible. My nausea lasted my whole pregnancy although not as badly as the first 15 weeks until I took medication.
My skin definitely got dryer when I was pregnant and I would get chapped spots on my hands and my face - they kind of sound like your "burns". They would look like a little red welt sometimes a couples of inches around and they hurt. I used baby oil after a shower and Gold Bond lotion on the extra dry spots.