I had a bacterial intestinal infection. I was treated with antibiotics and got better after a week. My appetite returned to normal. And lately I have been eating a lot. I lost about 5 lbs when I got the infection. I am still losing weight. It is a concern because I already have a hiatal hernia, supraventricular tachycardia, and I am 5'8. I now am at 115 lbs. In the last two years I have been checked for leukemia twice, had a full blood panel, lupus, thyroid issues, etc. Everything came back fine, except that the doctors told me that I am digesting my food to quickly which is causing vitamin deficiency.