Safety & Red Flags
Most bowel symptoms are benign, but some warrant prompt medical attention. This guide is based on NICE clinical guidelines for IBS and colorectal cancer referral.
Emergency symptoms
Call emergency services (911 / 999) immediately if you experience:
Red flag symptoms
Blood in stool
Seek care nowSeek medical attention promptly — same day if possible.
Rectal bleeding can have many causes, some serious. It should always be evaluated by a doctor. Do not wait to see if it resolves on its own.
Very dark or black, tarry stool
Seek care nowSeek urgent medical care — this may indicate bleeding higher in the digestive tract.
Black, tarry stools (melaena) can indicate bleeding in the upper gastrointestinal tract (stomach or small intestine) and require prompt evaluation.
Unexplained weight loss
See doctor soonSee your doctor within 1–2 weeks.
Losing weight without trying, especially alongside bowel changes, warrants investigation to rule out serious underlying conditions.
Fever alongside bowel symptoms
See doctor soonContact your doctor or seek same-day care.
Fever combined with diarrhea or abdominal pain may indicate infection, inflammation, or other conditions requiring treatment.
Symptoms waking you from sleep
See doctor soonDiscuss with your doctor at your next appointment, or sooner if severe.
IBS symptoms typically do not wake people from sleep. Nocturnal symptoms may suggest organic disease and should be investigated.
Severe or persistent abdominal pain
Seek care nowSeek medical care promptly. Call emergency services if pain is severe.
Severe abdominal pain, especially if sudden or accompanied by rigidity, may indicate a serious condition requiring urgent care.
New symptoms after age 50
See doctor soonDiscuss with your doctor, who may recommend investigation.
New onset of bowel symptoms in people over 50 warrants investigation to rule out colorectal cancer and other conditions.
Family history of colorectal cancer or IBD
Mention to doctorMention this to your doctor when discussing your symptoms.
A family history of colorectal cancer or inflammatory bowel disease (IBD) may affect the investigations your doctor recommends.
IBS vs Inflammatory Bowel Disease (IBD)
IBS and IBD (Crohn's disease, ulcerative colitis) can have overlapping symptoms but are different conditions. IBD involves actual inflammation and tissue damage; IBS does not.
When to see a doctor
New or changed symptoms: If your bowel habits change significantly and persistently (lasting more than 3 weeks), see your doctor.
Symptoms affecting quality of life: If IBS symptoms are significantly impacting your daily activities, work, or mental health, your doctor can help with management strategies.
Before self-treating: Don't start elimination diets, supplements, or medications without medical guidance — some interventions can mask important symptoms.
IBSTrack's medical boundaries
IBSTrack provides stool characterization and pattern tracking only. It cannot diagnose conditions, detect disease, or replace clinical assessment. If IBSTrack flags a red-flag symptom in your log, it will prompt you to seek medical advice — but this is a reminder, not a diagnosis.