How does this even happen? I'm so sorry OP, get better ASAP!

I would get checked for hyperthyroidism. A couple symptoms are excessive eating and extreme weight loss

You would think that's a problem that would quite handily solve your other problem. Ah well, shows what I know.

Get a food addiction to cheesecake and the low body weight problem will be gone right quick!

I’m sorry but your doctors a ******* moron. There has to be an underlying issue. If you’re eating enough to be ‘addicted’ to food but don’t weigh as much as a renaissance statue then there’s something wrong with your metabolism!

Worms’ll do that to ya!

As someone who used to have an eating disorder, I can say it's possible to be both underweight and be addicted to, and obsessed with food. I sincerely hope that's not the case for you, OP, but if it is, I wish you the best of luck with recovery.

As another poster said, Hyperthyroidism could be one of the underlying causes. Another is Thymoma - a cancer of the Thymus gland. Do some research online and next time you see your doctor, you will be able to ask some questions. Source, I have both Hyperthyroidism and a tumor in my Thymus gland. The symptoms are similar. A PET scan shows the tumor is benign so don't worry about me.

I think it's time your and your doctor have a serious heart to heart talk with your tapeworm about its unhealthy eating habits.

You’re not alone...I had the same thing happen a few weeks ago