While my body's preferred mode is to gain weight, I went through a period of time (about
3 years) where I couldn't gain weight no matter what I did. I ended up 35 lbs underweight, but I had completely lost my appetite and couldn't eat much at a time, so at least I had something to work with - eating more, and I did, slowly.
For those that are losing weight, add up your calories you get in a day and make sure you get enough. There are some good food journals out there - find one that makes sense to you. I liked the online version, as I was having to send it in to my doc monthly (/www.myfitnesspal.com/
Keep trying to eat, even just a couple of bites, many times a day.
Look for those snack that you can add more calories to by adding an avocado, nut butters, protein powder or anything that will increase your calories in a healthy manner. I used to add protein powder to my nut butter - sort of odd at first, but I got to where I nearly looked forward to it because it went down easily.
Herb only treatment for Lyme & Bart ended 12/11 - no active symptoms for 2 yrs -Herb only treatment for Babesia ended 12/12www.healingwell.com/community/default.aspx?f=30&m=2977364
Had Lyme, Bart, Babs, RMSF, Ehrlichia, Myco, Anaplasmosis, EBV
New Lyme case 8/2014 - Healed 1/31/15 - unknowingly had Asymptomatic Babs and Asymptomatic Bart, being treated now though (2/2016)