Yes, you appear to be having problems which should be seriously looked into.
Oily stool that floats is medically called steatorrhea. Pancreatitis and cholangitis are the main cause. Other possibilities are inflammatory bowel conditions such as Crohn’s, celiac, IBS etc. It can be side effects of slimming pills. Bacterial overgrowth and short bowel syndrome where food passes very quickly can be another cause.
Patients with chronic pancreatitis have recurrent abdominal pain of varying intensity along with steatorrhea or oily foul smelling stool. Pancreatic enzymes (amylase and lipase) are often normal. Common tests used for diagnosis are fecal elastase in stool, serum trypsinogen, CT scan and ultrasounds (which often come back normal), MRI, ERCP and MRCP (all of which are more conclusive). Usually after chronic pancreatitis patients develop insulin dependent diabetes mellitus and this should be ruled out by fasting blood glucose, post prandial blood glucose and glycosylated hemoglobin (a test which gives last 3 months control over blood glucose). Diabetes often causes rapid weight loss.
Crohn’s disease is a difficult entity to diagnose and can cause weight loss. Along with gut symptoms skin disorders and arthritis too are commonly seen with Crohn’s. An upper GI series using barium dye is done to see the condition of small intestines. The degree of involvement of the large and small intestine may vary from person to person. A biopsy is the most confirmatory. An elevated ESR, low protein, minerals and iron in blood are the other findings in Crohn’s which may or may not be present. A recent advancement in Crohn’s diagnosis is video capsule endoscopy.
Gluten is a complex protein present in four main grains---wheat, rye, barley and oats. If you have gluten intolerance, then you probably have celiac disease or Non Celiac gluten sensitivity. There are blood tests called celiac test to detect gluten intolerance.
Diagnosis of IBS is through elimination of other inflammatory bowel causes.
There are many other causes of unexplained weight loss like worms in stool, depression, anorexia nervosa, AIDS, cancers especially colon cancers (ruled out as you had a colonoscopy in 2012), drug abuse, infections and loss of appetite.
Please discuss with your doctor. The above mentioned tests should be done.
I sincerely hope you will find this information useful in your journey towards better health.
Hope you get well soon! Good Luck and take care!
I am having exercise for everyday since Nov 2012, i.e. morning jogging for 30 minutes and biking for every weekend. For my weight lost, it is because of the regular exercise?
Yes, weight loss is possible due to exercise, but it does not explain your floating stool and other symptoms. Also, sudden weight loss should be investigated.