What are the possible medical complications related to hodgkin's disease?

Anemia, fatique. Even before chemottherapy, fatigue, anemia, pain..Are common..These can be worse for awhile during treatment (except pain) as well as nausea vomiting and long term...Sterility.
Numerous. Hodgkin's used to mean certain death, and the fact that the large majority of people get cures is reason to be grateful. Aside from direct effects of the tumor (mechanical effects, plus the fever, night sweats, weight loss -- which affect many people), the most dreaded (thankfully quite rare) complications involve immunity against the tumor directed at the nervous system.