Hello there,
While I don't know the details of your situation, almost all of us here can relate to the fatigue issue and I can offer this as input which I have learned through first-hand experience.....
When you get sick, your body has to use as much energy as possible to fight illness be it for a cold, flu or injury. That being said, when you are dealing with inflammation brought on by crohn's, your body is using up a ton of energy to fight off inflammation, which leaves you feeling zapped most of the time. The stress, depression and pain from it all doesn't help the situation. It wears you down mentally and physically.
Also, sometimes having crohn's leaves us with no choice but to spend as much time on our sofa or in our bed as possible (if not the bathroom
). It's only natural that we may become a bit lazy after a flare hits lol. Once we are able to get around more comfortably, our bodies aren't used to it because we have been considerably idle for so long. We need to re-train ourselves to the idea of getting out and about but also allow our bodies time to rest when it is needed because pushing yourself too hard too soon doesn't do you any good and may potentially re-trigger a flare if you are not careful.
Iron and B12 deficiency are common causes of fatigue because when the part of your digestive system that absorbs these vitamins is inflamed, damaged or removed via surgery, you will develop signs of fatigue in addition to more potentially life-threatening complications. Getting your B12 levels checked is just as important as getting your Iron levels checked as B12 deficiency anemia shows most of the same symptoms almost identical to Iron deficiency anemia.
And once you are out of a flare, sometimes our bodies do not go back to what they used to be. They may become hypersensitive to physical discomforts especially in the abdominal area and/or they will become tired more easily.
Those are just a few examples of fatigue.
A few things to consider when trying to improve your energy levels are your diet and mental/physical well being.
A high-protein diet fuels your body with energy. Clean eating diet with little "junk" food in general helps to relieve your body of unwanted and unnecessary additives and preservatives that can drag you down both mentally and physically. Slowly increasing your physical activity can help you combat fatigue down the road. If you are well enough, how about you try going on 15 - 30min walks per day to get your body into the habit of a physical routine. You will find it easier to do as time goes on and will be able to eventually push your energy levels further.
Do your best to take care of your mental health as well. Reduce your stress levels in healthy ways. For example, I like to meditate when I am stressed. I take baths to relax my body. I try to make any amount of physical activity a routine in my every day life be it walking or aerobics or jumping in place or whatever. Exercise increases the feel-good sensors in your body. I spend time reading or working on craft projects or watching funny shows to help distract my mind, or making time to be in the company of others even when i sometimes don't feel like it. Things like this help to keep me slightly more refreshed than if I were to keep myself idle. Even if you don't have people around you to support you,, surrounding yourself with other good influences in the form of activities that interest you can help you to combat some of the negative thoughts that come from having crohn's.
I hope you start to feel better soon.