HomeAnswersMedical Gastroenterologyblack stoolsWhy is there frequent change in the color of the stools?

I have a burning sensation in the lower right abdomen and noticed dark red patches in the stool. Please help.

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The following is an actual conversation between an iCliniq user and a doctor that has been reviewed and published as a Premium Q&A.

Answered by

Dr. Ajeet Kumar

Medically reviewed by

iCliniq medical review team

Published At March 26, 2021
Reviewed AtSeptember 5, 2023

Patient's Query

Hi doctor,

I am a 36-year-old male. My height is 5 feet 7 inches, and my weight is 128 lbs. I recently consulted you for a burning sensation in the lower right abdomen. Not sure if it is the intestine. Today I noticed a dark red patch in the stool. I am trying to meet a gastroenterologist here in person. Can you please tell me what all tests I need to ask them are? Is it very severe? I just noticed only today. I am attaching the picture. I feel like it is important to confirm something major.

Answered by Dr. Ajeet Kumar

Hello,

Welcome to icliniq.com.

I have seen the photo of stools you attached (attachments removed to protect the patient's identity), which has some maroonish color impression over one side. Do you think it is blood? Since blood usually washes away and turns the color of the water red. I see this red impression does not stain water red as otherwise, the blood would do.

I agree that you should see a gastroenterologist in person, and there is no harm if you go for a diagnostic colonoscopy to see inside your large bowel and part of the small bowel and make sure there is nothing wrong going out there.

Investigations to be done

You should ask your gastroenterologist to get following tests. Stool detail report. Stools for occult blood. Stool for ova parasites. Stool calprotectin levels. And Colonoscopy. and lastly if required CT enterography.

Regarding follow up

You can directly reach out to my profile and book an appointment.

Patient's Query

Hello doctor,

Thank you doctor for the details.

I am attaching another picture that looked like dark red or pink color mixing in water. Is this looking like blood? I had probiotic gummy. Not sure if that is causing any color. Doctor just ordered for H.phylori bacteria test. He recommended for CT scan abdomen and pelvis with contrast. Is that a safe procedure? I am not ready for a colonoscopy at this point. So, trying other safe procedures if that helps. I got an appointment for gastroenterologist after two weeks only and meanwhile, can I take Omeprazole to avoid any further complication if there is any? Will that heal minor bleeding if there is any?

Answered by Dr. Ajeet Kumar

Hello,

Welcome back to icliniq.com.

Yes, from the picture (attachments removed to protect the patient's identity) it is looking like blood, but blood tends to stain red when it comes in contact with water. This frequent change in the color of the stools is because of inflammation going on within the gut. Overall, these stools and your symptoms are not normal and need to be treated. CT scan is a relatively safe procedure, and it is just a snapshot of your tummy, and it would guide your further treatment based on the extent of the damage to the gut after those pills intake and baking soda intake. Omeprazole and similar drugs in the group like Esomeprazole, which I suggested, are safe and can use right away without waiting until your gastroenterologist appointment. Colonoscopy can be performed later once you meet a specialist gastroenterologist in person there.

Patient's Query

Hi Doctor, thank you for the reply.

My stool last five days looked completely normal. Not sure if what I saw is blood or the probiotic gummy. Can the blood leakage happen intermittently? H pylori test came negative this week. Waiting for test result on FOBT (fecal occult blood teat). Anyway, I am thinking of taking a CT scan to be on the safer side. My thyroid level got low this last year because of Hashimoto’s thyroiditis. Started taking Levothyroxine for that. I read gut leakage is one of the main causes of that or other autoimmune disorders. Is gut leakage related to ulcers or other inflammation? For CT scans they use IV contrast here. Is that safe even for thyroid-low cases? Also, a lot of symptoms I read related to stomach acid low and high cases look similar. In my case, does it look like I have high stomach acid or low? I just do not want to do any opposite remedy and worsen things. Now I started feeling a little better after starting Omeprazole five days back.

Kindly suggest. Thank you.

Answered by Dr. Ajeet Kumar

Hello,

Welcome back to icliniq.com.

Well yes, the bleeding often occurs intermittently. Your blood does not seem to be related to H. pylori and that is the reason this test came negative. I suggest you go for a CT scan since it will tell us if there is any gross pathology within the small bowel, large bowel, or any part of the abdomen. Afterwards vivid plan for a procedure like upper endoscopy or colonoscopy in case there is a problem in any relevant part of the bowel like stomach or large bowel respectively. I do not think that you have a gut leakage because if you have gut leakage then you will have diarrhea with excessive loss of sodium and this leads to fluid overload or water retention over the feet. Secondly, you are right about the low and high acid levels, because it has almost the same symptoms but the change in the bowel color particularly that maroon color in your stools last week suggests a problem within the large bowel and not within the stomach. So I do not think acid has any role in your current symptoms.

Also, I do not think there is a problem with low thyroid and IV contrast injection for a CT scan abdomen. you can go for it.

I hope this answers your questions.

Thank you.

Patient's Query

Thank you, doctor.

I got the CT scan, and stool test for FIT and H. pylori came negative. So no issues were found there. I did not see any blood color in the stool for the last two weeks. I think this could rule out some of the issues. Does a CT scan identify parasite infection also? What are the issues a CT scan can rule out? Is there any other test I still need to do? I have had mild weight loss of four percent each year for the last six years and my digestion was also not as great as before. That is the reason I tried to check for any issues related to the abdomen causing malnutrition or weight loss. Any other major issue I need to check for based on the tests done so far and my symptoms? My doctor said that Hashimoto’s auto-immune disorder might also cause some stomach-related auto immune disorders like pernicious anemia.

Answered by Dr. Ajeet Kumar

Hello,

Welcome back to icliniq.com.

Good to know that your CT is normal. As far as I know, you do not have diarrhea. The main issue was right-side abdominal pain. You probably remember when he had a video conversation I said this can be a nerve pain. A nerve that is compressed in between two muscle layers causing pain. I also suggested you have a local injection of Xylocaine by a trained gastroenterologist in a clinic. Later if you show improvement a 1 mg of injection Triamicilone (steroid) can be given to suppress this pain for a longer duration.

The tests which you have done are all normal. and does not identify a problem or inflammation within your bowel. Since you have Hashimoto's thyroiditis, it is associated with certain gut and stomach-related conditions namely pernicious anemia celiac disease, and autoimmune enteropathy. There are certain blood tests that you can do to confirm the above possibilities. Nevertheless, your symptoms of consistent right-side abdominal pain are not related to the above possibilities. I still feel that the pain is nerve pain and needs a completely different approach which is local injection of the Xylocaine rather than testing you further with blood tests. So plan is to ask your gastroenterologist to give an injection of Xylocaine at the site of pain and see if there is improvement in your pain.

Additionally, you can get some blood testing, since there is no harm in testing it. I suggest you do the following tests,

  1. Antinuclear antibody.
  2. Anti-parietal cell antibodies.
  3. antibodies IgA and IgG.
  4. Serum IgA levels.

Get these above tests and kindly send me reports of the CT scan and your current thyroid testing.

Thank you.

Patient's Query

Hi doctor,

I got the report that the CT scan looks normal. I asked for a detailed report and images. I will share it once I get it. I am attaching reports of parasite test, CBC, CMP, ANA test, pernicious anemia, and thyroid test done last week. ANA test and thyroid test indicate something. Please let me know if this test covers all parasites or more testing we can do here. For me, weight loss is consistently happening at 5% each year for the last six years. Also, I see a couple of my family members also started losing weight mildly in the last two years. Not sure if it is a coincidence. I stayed in a bachelor room six years back which is not that hygienic. So I am not sure if I got any parasite infection during that time and carrying still. CBC and CMP levels almost stayed the same way for the last four years. Does CBC and CMP normally indicate something if there is any long-lasting parasite or bacterial infection?

Please suggest.

Answered by Dr. Ajeet Kumar

Hello,

Welcome back to icliniq.com.

Good to hear from you. I hope everything is alright otherwise. The report you uploaded suggests thyroid disease (attachment removed to protect patient identity). There is no new thing in the laboratory reports. The ANA (antinuclear antibody) and TSH (thyroid stimulating hormone) elevation is expected in your cases given your history of Hashimoto's thyroiditis. I do not see anti-parietal cell antibodies in the given test result. Kindly confirm with them. Raised TSH with normal FT4 levels suggests that you are on medications and it is taking time to improve your thyroid functions. You can consult with your thyroid specialist doctor to give you an expert opinion regarding that, maybe they can consider increasing the dose of thyroxine medication. 5% weight loss in 1 year, and gradually, is an alarming thing, and you need not worry about that. Your CBC showed a normal eosinophils count, which is against the notion that you have a parasitic infection. Eosinophils are usually high in parasitic infections, which you do not have. CBC always gives us a good clue about the type of infection. Since you have had normal CBC for several years now, it is unlikely that you have been suffering from chronic bacterial or parasitic infections.

Patient's Query

Hello doctor, thank you so much for the reply.

I have attached my CT scan image. Please check and let me know if you see any abnormalities. I did not see any blood-like appearance in the stool after that. So that is good. Apart from the mild symptoms I mentioned earlier, another thing I noticed was when I eat spicy foods I feel irritation in my stomach and loose stool which was not the case a few years back. I also read that mucosal lesions in the small intestine could cause similar symptoms. Is there any relation you see here? Few other questions

1. Since the ANA antibody level is high and indicates nuclear, nucleolar pattern, is there any test to check for any specific autoimmune disease I have in addition to Hashimoto's?

2. Is colonoscopy only for diagnosing large intestine issues?

3. Also, I read about CT colonography. Is that a safe and effective procedure in case we are trying to investigate further at a later point?

4. For diagnosing small intestine diseases, what tests or procedures are available? I read about capsule endoscopy and enteroscopy. Any risks with that?

5. For the parietal antibody check, I thought they ordered an ANA panel only. I do not see any other result related to that. Please let me know if that does not cover it. I can ask them to order that separately.

6. I will be going for an annual physical free checkup next month. Are there any additional blood or stool tests you recommend adding there related to this since that could be covered in the free annual physical?

7. In Recent times I have been getting slight knee and leg pain, crawling, or itching sensation in my feet while sleeping. Do you see any relation to digestive issues or could be related to thyroid issues?

Answered by Dr. Ajeet Kumar

Hello,

Welcome back to icliniq.com.

You sent me only two snapshots of the CT scan, this is not sufficient for evaluation (attachment removed to protect patient identity). A formal CT scan image file is a large file that has a series of images approximately 100 plus images of the abdomen taken at 0.1 cm intervals. But, if you had a formal voice with the radiologist who did your CT scan, and said it is normal, then there is no problem. I would appreciate it if you could arrange the written report of the CT scan abdomen.

Spice intake causes problems for everybody. Diarrhea, abdominal cramps, and increased feeling of acidity are common and do not suggest a small bowel problem per se. If you have diarrhea without eating spicy meals, then there is a problem. You already had a good autoimmune panel in the first place, which has mentioned various other antibodies namely SM antibodies, DNA antibodies, Sjogren profile, and celiac, and all were negative. The only test which was missing was anti-parietal cell antibodies, and anti-thyroid antibodies namely anti-thyroid peroxidase antibodies (anti-TPO), and thyroglobulin antibodies. I did not mention the two later tests since you are already in follow-up with your thyroid specialist who has been seeing these antibodies already. I do not think there is any other testing required.

A colonoscopy is only for detecting problems with the colon. CT colonography is not required, and the CT SCAN which you already have, can give us sufficient information whatever is necessary without going for a repeat CT scan. Again capsule endoscopy and enteroscopy are not required. But I suggest you get anti-parietal cell antibody tests. You can just have a routine annual check-up, no additional testing is required.

It may be thyroid-related or vitamin B12 deficiency-related. But your complete blood panel includes that also if I have not forgotten. If vitamin B12 levels are normal, then it is simply due to thyroid issues. I suggest you take capsule Pregablin 75 mg at night and see if it improves your symptoms. This medication helps to improve neuropathic pain, pain due to muscle spasms.

I hope this helps you.

Thank you.

Same symptoms don't mean you have the same problem. Consult a doctor now!

Dr. Ajeet Kumar
Dr. Ajeet Kumar

Medical Gastroenterology

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