I was quite shock to see how much weight he had lost during the school holiday. I remember very well that our last class was in November and he was still the chubby looking boy. It was heartbreaking for me to see him losing 9 kg in just 2 months.
I decided to read about the disease starting with wikipedia. According to the site, it is said that the usual onset is between 15 and 30 years of age, with no difference between men and women. The main gastrointestinal symptoms are abdominal pain, diarrhea, which may be bloody, and weight loss.
The cause of Crohn's disease is not known. It is only known that the disease occurs when the immune system contributes to damage of the gastrointestinal tract by causing inflammation.
My student, A, will be on a long term medication and would not be able to take part in any outdoor activity. I hope the doctors will be able to help him recover soon.