What to do if I have bright red blood in my stool and mouth ulcers at 16 years old?

Question #29656

45 days ago

130

What to do if I have bright red blood in my stool and mouth ulcers at 16 years old? - #29656

Client_d57ee5

Since this is second time I had blood in my stool and this time it was bit more bleeding like it would be probably 5 to 7 ml. I had constipation from last two days and didn't even drank enough water . I am 16 y/o also have body heat problem now also have mouth ulcer,blood was bright red and it was not paining but now it is hurting little. Pls suggest me something to get rid of this hope you'd understand and help. Thanks

How long have you been experiencing blood in your stool?:

- This is the first time

How would you describe the consistency of your stool?:

- Hard and dry

Have you experienced any other symptoms along with the blood in your stool?:

- No other symptoms

How much water are you drinking daily?:

- 1-2 liters

Have you had any recent changes in your diet?:

- Other changes

How would you rate the pain from your mouth ulcer?:

- Severe — affects eating

Do you have any known allergies or medical conditions?:

- No known allergies or conditions

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Doctors' responses

Dr. Arsha K Isac

I am a general dentist with 3+ years of working in real-world setups, and lemme say—every single patient teaches me something diff. It’s not just teeth honestly, it’s people… and how they feel walking into the chair. I try really hard to not make it just a “procedure thing.” I explain stuff in plain words—no confusing dental jargon, just straight talk—coz I feel like when ppl *get* what's going on, they feel safer n that makes all the difference. Worked with all ages—like, little kids who need that gentle nudge about brushing, to older folks who come in with long histories and sometimes just need someone to really sit n listen. It’s weirdly rewarding to see someone walk out lighter, not just 'coz their toothache's gone but coz they felt seen during the whole thing. A lot of ppl come in scared or just unsure, and I honestly take that seriously. I keep the vibe calm. Try to read their mood, don’t rush. I always tell myself—every smile’s got a story, even the broken ones. My thing is: comfort first, then precision. I want the outcome to last, not just look good for a week. Not tryna claim perfection or magic solutions—just consistent, clear, hands-on care where patients feel heard. I think dentistry should *fit* the person, not push them into a box. That's kinda been my philosophy from day one. And yeah, maybe sometimes I overexplain or spend a bit too long checking alignment again but hey, if it means someone eats pain-free or finally smiles wide in pics again? Worth it. Every time.

45 days ago

Hello
At age 16, bright red blood in stool after constipation with hard, dry stool is most commonly due to a small tear in the anal area called an Anal Fissure or sometimes swollen veins called Hemorrhoids. The fact that the blood is bright red, happened after constipation and low water intake, and is only a small amount strongly supports this — and it is usually not dangerous.
The mild pain that started afterward also fits a fissure, because the tear can sting or hurt slightly after passing hard stool. About 5–7 ml of bright red blood can look scary, but in this situation it is typically from the surface, not from inside the intestine.
Your mouth ulcers and feeling of “body heat” are very commonly linked to dehydration, stress, constipation, or minor nutritional factors (like low vitamins), and they often occur together during periods of low fluid intake. They are usually not related to serious bowel disease when there are no other symptoms like weight loss, persistent diarrhea, fever, or weakness.
What will help most right now is softening the stool and allowing the tear to heal. Increase water intake to around 2–2.5 liters daily, add fiber (fruits, vegetables, oats), and avoid straining during bowel movements. Warm water sitz baths for 10–15 minutes once or twice daily can reduce pain and help healing. For the mouth ulcer, a topical oral gel (like choline salicylate or lignocaine-based gel) and good hydration usually brings relief within a few days.
You should see a doctor if the bleeding keeps happening for more than a week, becomes heavy, occurs without constipation, or if you develop symptoms like dizziness, black stool, weight loss, or severe abdominal pain — those would need evaluation for conditions like Inflammatory Bowel Disease, though that is much less likely based on your current description.
Overall, this sounds like a common, temporary problem from constipation and dehydration, and with better hydration and softer stools, it usually settles within a few days.
Take care

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Dr. Bharat Joshi

I’m a periodontist and academician with a strong clinical and teaching background. Over the last 4 years and 8 months, I’ve been actively involved in dental education, guiding students at multiple levels including dental hygienist, BDS, and MDS programs. Currently, I serve as a Reader at MMCDSR in Ambala, Haryana—a role that allows me to merge my academic passion with hands-on experience. Clinically, I’ve been practicing dentistry for the past 12 years. From routine procedures like scaling and root planing to more advanced cases involving grafts, biopsies, and implant surgeries. Honestly, I still find joy in doing a simple RCT when it’s needed. It’s not just about the procedure but making sure the patient feels comfortable and safe. Academically, I have 26 research publications to my credit. I’m on the editorial boards of the Archives of Dental Research and Journal of Dental Research and Oral Health, and I’ve spent a lot of time reviewing manuscripts—from case reports to meta-analyses and even book reviews. I was honored to receive the “Best Editor” award by Innovative Publications, and Athena Publications recognized me as an “excellent reviewer,” which honestly came as a bit of a surprise! In 2025, I had the opportunity to present a guest lecture in Italy on traumatic oral lesions. Sharing my work and learning from peers globally has been incredibly fulfilling. Outside academics and clinics, I’ve also worked in the pharmaceutical sector as a Drug Safety Associate for about 3 years, focusing on pharmacovigilance. That role really sharpened my attention to detail and deepened my understanding of drug interactions and adverse effects. My goal is to keep learning, and give every patient and student my absolute best.

44 days ago

Hello dear
See as per clinical history it seems gastric issue like haemmorhoids or anal fissures infection
Differential diagnosis includes malabsorption syndrome.
Probably back pain and weakness is also due to excessive blood loss and radiating pain from stomach
I am suggesting some tests for confirmation of exact diagnosis and best treatment
Please share the result with gastroenterologist or general physician medicine for better clarity and for safety please donot take any medication without consulting the concerned physician
Serum ferritin
Serum RBS
Stomach USG
Urine analysis
Rft
Lft
Culture
Endoscopy
Anascopy if recommended by gastroenterologist
Rectal physical examination
Esr
Cbc
Hopefully you recover soon
Regards

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Dr. Aarav Deshmukh

I am a general physician with 8 years of practice, mostly in urban clinics and semi-rural setups. I began working right after MBBS in a govt hospital in Kerala, and wow — first few months were chaotic, not gonna lie. Since then, I’ve seen 1000s of patients with all kinds of cases — fevers, uncontrolled diabetes, asthma, infections, you name it. I usually work with working-class patients, and that changed how I treat — people don’t always have time or money for fancy tests, so I focus on smart clinical diagnosis and practical treatment. Over time, I’ve developed an interest in preventive care — like helping young adults with early metabolic issues. I also counsel a lot on diet, sleep, and stress — more than half the problems start there anyway. I did a certification in evidence-based practice last year, and I keep learning stuff online. I’m not perfect (nobody is), but I care. I show up, I listen, I adjust when I’m wrong. Every patient needs something slightly different. That’s what keeps this work alive for me.

43 days ago

Bright red blood in your stool, especially when associated with constipation, often indicates bleeding from the lower gastrointestinal tract, typically the rectum. The bright red color suggests it’s likely due to an anal fissure or hemorrhoids, both common in cases of straining during bowel movements. Since this is happening for the second time, it’s important to address both the bleeding and the constipation. Start by increasing your water intake significantly, aiming for at least 8 glasses a day, which can help soften stools and ease bowel movements. Incorporate more fiber-rich foods into your diet, such as fruits, vegetables, and whole grains, which can improve stool consistency, reducing the need to strain. Over-the-counter stool softeners or fiber supplements could also be helpful in the short term but do consult with a healthcare professional before using them. Regarding the mouth ulcers, ensure you’re maintaining proper oral hygiene, and consider using an antiseptic mouthwash to prevent secondary infections. Over-the-counter topical treatments or gels can provide some relief for pain and aid in healing. The body heat you mentioned might be subjective, but staying hydrated and consuming cooling foods like cucumbers or yogurts could be beneficial. Due to your age and recurring symptoms, I recommend scheduling an appointment with your doctor to rule out any underlying conditions. If you experience increased pain, persistent bleeding, dizziness, or any other new symptoms, seek medical attention promptly, as these could indicate a more urgent issue.

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