Will my student insurance in US, as an international student cover my pre-existing ileostomy caused due to Crohn's disease? I am planning on applying abroad for my further studies. But I have this disease called Crohn's, due to which currently I am having an ileostomy. Few of the costs associated with ileostomy are I need to buy accessories to maintain my ileostomy. And also I would need to take medication for my Crohn's, which I heard are quite costly abroad. So my question is:

1) Will the student insurance that the University collects help me with the accessories and the medications required?

2) Also, if at all I am eligible for the insurance, if something were to happen to me abroad(like an emergency surgery due to my pre-existing condition) would I have to pay for it from my pocket?

3) I heard that health care system in US is quite brutal. So is there any other country you would probably suggest for me to pursue my studies.

Correct me if I am wrong about the idea of health care. Thank you for your time.
You will find that insurance in the US isn't nearly as comprehensive as that of many other countries. Neither is there any universal health system in the US. So, this is a question that you need to explore separately with each university you might attend. 

My best guess, however, is that you will be disappointed most places. In the absence of clear statements from individual universities, assume the worst. 

Europe, including some non EU countries have good coverage, but even there you need to know whether it is available to non-citizen residents and students. It will vary, but the chances there seem better. 

But, to be clear, the health care system is quite good: doctors and such. It is the health insurance system that is brutal, and the two are quite distinct.