[King Kebab]

Has anyone ever had this and know what might be the problem?

[Nibz93]

Worms.

[Sprockette]

Are you sure you're eating more kcal and not just a lot of low kcal food?

If you are eating more kcal, then do you have any other symptoms and how long has it been going out? Are you exercising more, do you have more stress? short term, it could be an infection/food poisoning/something like that, or longer term, maybe diabetes (type 1) or an allergy/intolerance which you'd probably have other symptoms from? Thyroid problems?

When I lost a lot of weight a few years back, it was diabetes the first time and then coeliac the second. They mightn't be the most common causes though so best think if you have other symptoms or lifestyle changes that could explain it, and get to the doctor if you can't explain it. Though I suppose if you have no other symptoms, a doctor mightn't know where to start either (not a suggestion to ignore it, just thinking out loud!)

[SuperCat007]

I have the same thing although I have fibromyalgia and various intolerances which can cause it.

Talk to your GP, it could be something treatable or it could be a phase. Like a growth spurt etc. I go through food phases where I'm constantly hungry and eat all the time, then I hardly eat anything.

[hslt]

Loads of things - Diabetes, coeliacs, Crohn's, IBS or other malabsorption, exercise, hyperthyroidism, idiopathic, you not eating as much as you think, stress/depression

On the other hand, you're probably fine, but I suggest you go to your GP for reassurance/just to be safe.