Your main character is sick with a fatal or non-fatal disease or illness that is commonly found in the fictional world. Is the disease or illness similar to the real life ones or not? Is there a way to treat this disease or illness with certain medicines, professional help, or not? Are they life threatening or not? How does your character handle dealing with this problem?
Fictional diseases/illnesses like this are mainly found in fantasy or science-fiction.
Explain in detail.