I have lost my appetite.....

Yes! I've dealt with this before, and I'm beginning to deal with it again now. It usually happens when I'm really stressed about something, or something dramatic happens in my life.

If you are going a lot under 1200 calories, this isn't very good-- the best advice I got for this situation was to eat high-calorie foods such as nuts, and etc. I'll look for the post I saw earlier and edit this post to give you some more examples. This helps because you don't have to eat a lot, but you are still getting a sufficient amount of calories.

I hope this helps, and good luck!!!

Here is the list of high calorie foods that someone else was gracious enough to write out for me:

Peanut butter! (peanut only peanut butter is the BOMB!)
Cottage cheese! (I FINALLY tried this and it's AWESOME!)
Greek Yogurt! (plain and add fruit to it!! SO GOOD!)
Eat an whole portion of lean meat.. A whole 6-8 oz!
Fish!! (so may kinds and so yummy!!!)
Eggs! Pre boil them! They are easy to eat that way! I take them peel them and mix them with mustard, veggies and stick it on a cucumber or lettuce leaf
Tuna salad! I make this the day before! I put this on cucumbers, zucchini or lettuce too!
Overnight oatmeal! (grab and go the next morning! I LOVE this!)
Apples! Oranges! Pears! Plums! Carrots! Celery! Red Grapes! Baby Cucumbers! Baby Peppers! Tomatoes! (I eat them like apples with a little salt!)
Make a salad the night before! Take the dressing container with you!
Eggs take like 5 minutes to cook in the morning if you scramble them!! Add some cheese, spinach and mushrooms and you're golden!
Make soup or chili on the weekend and scoop out a cup everyday to take with you! (assuming you have access to a microwave!) or for a quick dinner!

yes I have. Take it easy on yourself it will pass. For me it was stress, sometimes excitement. When I met my husband I didn't eat for so many month i became anemic. It was love. I have also had this syndrome when I was bored with my food. It will pass.
Talk to your doctor if you think its the meds.

This happens to me, which is partially why I keep my diary private. I have stomach issues that I take meds for but generally I still dont have much of an appetite, it could be your meds tho

I have hypothyroidism and i will get spurts of energy and lack of appetite. Then mine goes back to norm and I am tired and hungry again. It very well could have something to do with your thyroid.

I am a doctor AND I had hyperthyroidism, then had my thyroid destroyed, and now have hypothyroidism that is controlled by daily medication.
Please do NOT think thyroid at this point. There are sooooo many other combined symptoms that come together when thinking hyper or hypo thyroid.

Hypothyroid common symptoms include: Fatigue, Increased sensitivity to cold, Constipation, Dry skin, Unexplained weight gain, Puffy face

Hyperthyroid common symptoms include: Sudden weight loss, even when your appetite and the amount and type of food you
eat remain the same or even increase, Rapid heartbeat (tachycardia) — commonly more than 100 beats a minute — irregular heartbeat (arrhythmia) or pounding of your heart (palpitations); Increased appetite, Nervousness, anxiety and irritability, Tremor — usually a fine trembling in your hands and fingers, Increased sensitivity to heat, An enlarged thyroid gland (goiter), which may appear as a swelling at the base of your neck, Difficulty sleeping

I have experienced both, and believe me, it is MUCH more than lack of appetite. If only it were that simple.

As for previous replies, I agree that you should attempt to take in calories and absolutely take a daily multivitamin.