The causes for increasing weight, increased appetite, craving of carbohydrates can be;
1) diabetes mellitus; glucose tolerance test and glycosylated hormones would be advised.
2) abnormalities of thyroid; low thyroid
3) adrenal dysfunctions
4) prolactin abnormality
Idiopathic edema is other cause for your symptoms, which characterized by impaired water excretion and evidence have shown that antidiuretic hormone is involved in this disease.
Please feel free for your follow up questions.
I would be happy to assist you further, if you need any more information.
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