Stomach diseses, gastritis, peptic ulcer disease, stomach cancer
all can lead to
nausea and loss of appetite. Do you also have yellowish discoloration of your skin, eyes and urine? That could be due to gall bladder disease or hepatitis. Eat small healthy meals. You need to consult a primary care physician. He will further refer you to a gastroenterologist. A clinical examination and tests like esophagogastroduodenoscopy may be needed. Ultrasound abdomen may provide some clue.