Yes, I am experiencing ankle swelling. I have never heard of it being caused by IBS (someone correct me here if I am wrong.) I have been researching it and found that it can be caused by many different things, some simple, some serious. For example, ankle swelling can be caused by obesity, sitting or standing for long periods of time and/or shoes that are too tight.
However, ankle swelling can be cause by more serious conditons such as circulatory and vascular diseases.Venous insufficiency—a weakness in the valves of the veins—can cause blood to back up in the ankles, leading to an uncomfortable swelling. Swelling can also result from heart failure, which has many causes, such as high blood pressure, heart attack or anything that weakens the heart muscle. Other common causes of chronic ankle swelling are lymphatic and kidney disease, diabetes, gout and rheumatoid arthritis.
So, I highly recommend that you don't immediatley assume that the swelling is from IBS. You need to go see your doctor and have him/her access your condition.