I have an itchy rash, started on back, is now spreading to abdomen and face. i have a severe headache, dry mouth, and nausea. no fever, but chills.

See a doctor!: Hi. That's sure not in my field, but I can tell you that needs to be evaluated. I can think of several possibilities, but without history, physical exam, and any appropriate diagnostics, it's guesswork. Please see a good doctor for a proper evaluation. Good luck!

See Dr. ASAP: These symptoms could be caused by a number of different conditions, including viruses and bacteria (including strep -- even without a sore throat). It is very important to see a Dr. today for diagnosis and treatment. I hope you feel better soon!