My 28 year old son is covered with a pin prick rash that itches. It started on he top of his feet. He is negative for mono and hepatitis. His liver enzymes are over 600. Non drinker. No daily meds. Slightly overweight experiencing very dry flakey skin and very thirsty. Also numbness in his finger tips. This has lasted for 8 days and is getting worse. Any idea what he should do?