Last summer i was very ill nausea and vomiting, diarrhea, weight loss, body shaking yellowing of skin did tests and nothing was found. possible cause?

Possible hepatitis: Your symptoms especially jaundice (yellowing of the skin) sounds like hepatitis. You might have had the wrong tests and some jaundice could be due to drugs, viruses, or bacteria.

Yellow Skin: There are many possible causes of yellowing skin. Among the most common causes are conditions such as jaundice, a liver condition, and uremia, a kidney condition. Sometimes a condition called hypothyroidism, which is marked by an improperly functioning thyroid, is at fault. Additionally, there are many other causes of yellow skin.