My suggestion would be to consult with a colorectal specialist for an exam, to receive and accurate diagnosis and treatment as deemed appropriate.
There can be several reasons for leakage of stool such as pelvic floor dysfunction, muscle or nerve damage, or loss of stool storage capacity. Often this is a result of child birth which usually appears in women over the age of 40.
You might want to try to use Metamusil to provide bulk to your stool. You could also begin to eat more fiber. Most people think that fiber is only a laxative, but it is also used to absorb the water in the stool. Antidiarrheal agents, such as Imodium AD and Lomotil, can be added to make the stools harder. Even though you do not technically have diarrhea, using Metamucil or Imodium AD can help make more formed stools.
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Dietary changes can certainly exacerbate fecal incontinence, so you may be on the right track to pinpointing the cause. If you get back on track with regard to your normal eating pattern, you may experience resolution of your symptoms.
I would suggest that you consult with your doctor as routinely, irritable bowel does not present with symptoms of fecal incontinence.
Symptoms of Irritable Bowel Syndrome Include:
Let me know if you have any other questions.