Hi, You are most likely to be suffering from Fibromyalgia Syndrome. This is a condition when there is severe and non-specific pain all over the body.
There are certain diagnostic criteria for Fibromyalgia. This consists of both symptoms, the complaints of the patient, and signs, the points elicited by the doctor. these are: Pain symptomalogy: widespread pain for at least three months. Signs of Tenderness: Tenderness in at least 11 of the 18 defined points. If you meet both these criteria, you will be most likely to have Fibromyalgia syndrome. See here for an excellent description of how FMS is diagnosed and treated. The other conditions which might present similarly are:
These can be differentiated by the doctor, although they may present in a similar manner superficially. You need to consult your doctor over these diagnoses and discuss the tests you will need to rule them out. Two important ways in which to combat this are: Maintaining a positive attitude: see here. Exercise: see here. With a proper effort, FMS can be cured. I hope this answer was helpful. If you need more information, feel free to ask. For accepting this answer, please click on the green 'accept' button below. Feedback/Bonus will be warmly appreciated.
The two most likely causes that would cause you to lose weight even with normal appetite are: Diabetes. Hyperthyroidism. You need to approach your doctor to check this out. there are many other causes for sudden weight loss, but these are the most likely causes. Only if these two causes are eliminated, as I said earlier, FIbromyalgia may be considered. SO you should approach a doctor for this. You can read up here: http://www.cnn.com/HEALTH/library/DG/00020.html
You can look it up here: http://en.wikipedia.org/wiki/Needle_aspiration_biopsy Once you have been diagnosed with hypothyroidism, you are likely to be recieving levothyroxine. Hence you should get your thyroid levels checked once again to see if this is the cause of your weight loss.
I hope this answer was helpful. If you need more information, feel free to ask. For accepting this answer, please click on the green 'accept' button below. Feedback/Bonus will be warmly appreciated.