It’s not like if you have Crohn’s disease, you’re burning up 24/7. Instead, your temperature might spike when your digestive tract is under siege during a Crohn’s flare. Fever is one sign that your body’s immune system has activated in response to a threat, and this can happen because of inflammation tied to Crohn’s disease, Dr. Farhadi says.
It’s pretty much a given that when you’re dealing with Crohn’s disease symptoms like diarrhea and a fever, you’re not going to feel bright-eyed and bushy-tailed. All that inflammation and your body’s resulting immune response can make you feel wiped out, Dr. Farhadi says. Diarrhea and its effects can also be a culprit, Dr. Philpott says. When you have diarrhea, your body doesn’t absorb the nutrients you eat as well as it should, and that can affect your overall health, she explains. This can possibly even lead to issues like anemia and dehydration, both of which can make you feel tired. Finally, to round it out, symptoms of Crohn’s can keep you up at night, making things even worse, Dr. Philpott says.