Diarrhea, abdominal pain and cramps, as well as blood in the feces are the main signs by which you can suspect Crohn's disease in a person. It can occur at any age, but according to the Crohn and Colitis Foundation, it is most commonly diagnosed in adolescents and adults between the ages of 20 and 30.
The UK's National Health Service says some people with Crohn's disease have high fevers, feel unwell and suffer from joint pain.
You may also notice signs of illness in the eyes, mouth, and skin: inflammation, redness of the eyes, painful areas of red and swollen skin, usually on the legs, and mouth ulcers.
Children with Crohn's disease may grow more slowly than other children.
The Crohn and Colitis Foundation states that patients are more likely to experience periods of symptom activity, flare-ups, followed by periods of remission in which you may not notice any symptoms at all.
There is no single test to confirm a Crohn's diagnosis, experts say, and the symptoms of the disease are often similar to other conditions, including bacterial infection.
The National Health Service reports that several factors can contribute to the development of this disease. These include your genes, as you are more likely to get the disease if a close family member has the disease.
Also, the development of the disease can be facilitated by a problem with the immune system, which attacks the digestive system of the body itself.
Other causes may be smoking, a history of stomach problems, or an imbalance in intestinal bacteria.