Thanks for contacting healthcare magic. Yes chons disease may cause abdominal pain and constipation problem. For treatment of chons disease you have to modify your diet like. .. Avoid fatty food and oily food. Avoid alcohol drinking and smoking. Avoid gaseous foods like. ... cabbage, cauliflower, Carbonated drinks, turnips, broccoli etc. .... Avoid caffeine . Reduce stress. Avoid dairy products. Avoid spicy foods. Avoid raw fruits and raw vegetables. Drink more water. Consent a gastroenterologist for further treatment. You have colonovaginal fistula so you have to correct it by surgically . I hope my guidance is helpful to you. Take care. Thanks.