Anorexia 
To dream that you suffer from anorexia indicates issues with self-esteem or image. You should learn how to appreciate who you are rather than discipline yourself negatively. You are a perfectionist and this is not healthy for you.
Bulimia
To dream about having bulimia is a negative sign, and it's generally a symbol of guilt or secrecy that is figuratively eating away at you.
It can also be a symbol of low self esteem or confidence that should be addressed immediately. It may be a good time to get regular medical checkup.
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