I know that my weight fluctuates quite a bit, and it doesn’t really depend on whether or not my Crohn’s is flaring particularly badly……. I am 179cm tall and 23 like you, and earlier this year when my peri-anal abscess was really big and being operated on etc I was down to 115 pounds or 53 kilos which is pretty scary for someone just on six foot tall! Now I am back to 125 pounds or 57 kilos and still look very slim, but not malnourished and scary like I used to. I haven’t changed meds or anything. I put it down to the usual fluctuations – work, stress, lifestyle, they all affect our weight. I know as a 23 yr old weight is very strongly connected to self-confidence etc and it isn’t nice to see it creeping on! Even though I’m still skinny as anything and a tall willow-wand, I wouldn’t want to put on much more weight because like you I am used to seeing 55-57kg on the scales and not higher than 57! A lot of it is a mental thing I think…..
Good news is you’re starting to feel better health-wise! I would say don’t worry about 10pounds because tis only a small amount (how tall are you?) – maybe if it rises to 20-30 I would worry!