24/7 Emergency Care. Our patients are first.
Seeing blood in the toilet can be frightening, especially when you cannot tell how much there is or why it happened. You may find a bright red streak on the toilet paper, see blood mixed into the stool, notice the water turning red, or find that the stool looks unusually dark, sticky, and tar-like.
You do not need to identify the cause before deciding what to do. Start with what you can see: how much blood is present, whether it has stopped or returned, what the stool looks like, and whether you now feel weak, dizzy, short of breath, or unable to stand normally.
Rectal bleeding becomes more urgent when it is continuing, increasing, changing the appearance of the whole bowel movement, or affecting how your body feels.
Pay Attention to What the Rectal Bleeding Is Doing
Try to remember what you noticed first and what happened next:
Was the blood only on the toilet paper, streaked on the outside of the stool, mixed through it, or pooling in the toilet?
Was it bright red, dark red or maroon, or was the stool black, sticky, and tar-like?
Did it happen once, or has it continued through more than one bowel movement?
Are you passing clots or seeing an increasing amount of blood?
Do you feel lightheaded when you stand, unusually weak when you walk, short of breath, or aware that your heart is racing?
You do not need to estimate the amount in ounces. A small streak that stops is different from blood that keeps appearing, fills the toilet, forms clots, or is followed by weakness or dizziness. Those changes help determine how quickly you need care.
Call 911 When Rectal Bleeding Makes Travel Unsafe
The bleeding is heavy or continuing and you have fainted, nearly fainted, or cannot stand safely.
You collapse, become confused, are difficult to wake, or feel too weak to move without help.
You have trouble breathing, chest pressure, a racing heartbeat, or pale, cold, clammy skin with the bleeding.
A large amount of blood or clots is continuing and you cannot travel safely by private car.
You are passing rectal blood and also vomiting blood or material that looks like coffee grounds, especially if you feel weak or dizzy.
These changes can mean that blood loss is affecting circulation throughout your body. Do not drive yourself or wait to see whether the symptoms settle. Call 911.
Come to the ER When Rectal Bleeding Should Not Wait
The bleeding is more than a small smear or streak, is continuing, or returns with another bowel movement.
You see dark red or maroon blood, or the stool is black, sticky, and tar-like.
Blood is mixed throughout the stool, the toilet water becomes red, or you are passing clots.
The bleeding comes with lightheadedness, new weakness, shortness of breath, or a heart that is racing at rest.
You have severe or worsening abdominal pain, marked abdominal swelling, fever, or the feeling that you are becoming seriously ill.
You take a prescribed blood thinner or antiplatelet medicine and the bleeding is more than a trace, keeps returning, or is joined by weakness or dizziness.
The bleeding began after a recent procedure involving the digestive tract and is more than the amount your care team told you to expect.
You do not need every change on this list. One meaningful change—especially ongoing blood loss, black or maroon stool, clots, weakness, dizziness, or severe pain—is enough to make the bleeding worth evaluating now.
When Rectal Bleeding Is Mild and Stable
A single small streak of bright red blood on the toilet paper or outside of the stool may be lower risk when it has completely stopped, has not returned, and you otherwise feel normal. There should be no black or maroon stool, clots, severe pain, weakness, dizziness, shortness of breath, or blood-thinner concern.
When all of those details remain mild and stable, urgent care may be a reasonable place to start for a same-day examination.
The important words are small, stopped, and not returning.
If the bleeding comes back, increases, becomes mixed through the stool, turns dark or tar-like, or begins to affect how you feel when you stand or walk, come to the ER.
The Color and Pattern Help Tell the Story
Bright red blood may appear as a streak when you wipe, on the outside of the stool, or in the toilet water. Dark red or maroon blood may be mixed more fully through the bowel movement. Black stool that is sticky or tar-like can represent blood that has changed as it moved through the digestive tract.
Color alone does not tell you how serious the bleeding is. The amount, whether it is continuing, and how your body is responding matter just as much.
You may describe the episode by saying:
“There was one streak when I wiped.”
“The water in the toilet turned red.”
“The blood was mixed through the stool.”
“The stool was black, sticky, and different from normal.”
“I felt lightheaded when I stood up afterward.”
Those details are useful. You do not need perfect medical words. Tell the physician what you saw, what happened next, and whether the bleeding changed what you could do normally.
If You Take a Blood Thinner
A prescribed blood thinner or antiplatelet medicine can make bleeding harder to stop. New rectal bleeding deserves a lower threshold for emergency evaluation when it is more than a trace, keeps returning, or comes with weakness, dizziness, shortness of breath, black stool, or clots.
Bring the name of the medicine, the dose, and the time you last took it. Do not stop or change a prescribed blood thinner on your own unless a clinician who knows your situation tells you to do so. The reason you take the medicine still matters, and suddenly stopping it can create a different risk.
How Our Emergency Physician Will Evaluate Rectal Bleeding
At Post Oak ER, the first step is listening to what you saw and how the episode changed. The physician will ask when the bleeding began, whether it stopped or returned, what color it was, how much you noticed, and whether you have pain, weakness, dizziness, shortness of breath, or a racing heartbeat.
Your medication list matters. Tell the physician about blood thinners, antiplatelet medicines, and pain relievers you take regularly, as well as any previous bleeding or recent procedure.
The examination may include checking your pulse, blood pressure, breathing, skin color, and abdomen. A rectal examination may be recommended when it can help clarify where the blood is coming from or whether bleeding is still present.
Testing is chosen from what the conversation and examination reveal. Blood work may help show whether blood loss has lowered your blood count, whether clotting is affected, or whether fluid loss is putting stress on the body. CT imaging may be considered when the bleeding is substantial, ongoing, or joined by findings that require a closer look inside the abdomen. Not every person needs every test.
Treatment can begin while the evaluation is underway. Depending on what you need, this may include IV fluids, medication, and close monitoring. If you need endoscopy, a blood transfusion, surgery, inpatient care, or specialist treatment, we can begin stabilization and arrange transfer to an appropriate hospital.
The goal is to understand how the bleeding is affecting you now, control immediate problems, and determine the safest next step.
24/7 Emergency Care Near The Galleria
Post Oak ER is open 24 hours a day at:
5018 San Felipe St
Houston, TX 77056
Our freestanding emergency room is near The Galleria and I-610. Adults and children may walk in without an appointment for rectal bleeding that is ongoing, recurring, dark or tar-like, or joined by weakness, dizziness, shortness of breath, or severe pain.
We serve people from Uptown, Tanglewood, River Oaks, Briargrove, Briarcroft, Highland Village, and the greater Galleria area.
For questions about arriving at Post Oak ER, call 832-581-2277. When rectal bleeding is heavy and you feel faint, confused, severely weak, or unable to travel safely, call 911 instead of driving.
Whether you’re in Westchase, Midtown, or the Heights, getting to Post Oak ER is simple. We’re centrally located near major Houston routes like I‑610 and San Felipe — just a short drive from Memorial Park and River Oaks. Many patients reach us via Westheimer or Woodway Dr., depending on their neighborhood.
We accept most major insurance plans and also welcome self-pay patients with transparent, upfront pricing. Many Memorial-area patients visit us using Blue Cross, Aetna, Cigna, Humana, Molina, and United Healthcare.
Yes. We’re open 24 hours a day, 7 days a week. Our freestanding ER model is designed to minimize or eliminate wait times so you’re seen fast.
No. Walk in anytime. If it’s an emergency, come straight in or call ahead and we’ll be ready: 832-581-2277.
5018 San Felipe St, Houston, TX 77056 — near The Galleria/Uptown. Free, convenient parking right by the entrance.
Yes. Our board-certified emergency physicians care for all ages, including pediatric emergencies.
Chest pain, shortness of breath, severe headache/migraine, abdominal pain, injuries and fractures, cuts requiring stitches, high fever, dehydration, allergic reactions, asthma attacks, and more. If you believe it’s life-threatening, call 911.
Yes. We offer on-site CT scans, digital X-rays, and a full laboratory, so most tests and results are done during your visit.
Absolutely. We routinely see patients from Uptown, The Galleria, River Oaks, Tanglewood, and Memorial.
A photo ID, insurance card (if available), a list of medications/allergies, and any recent medical records you have.
We accept most major private insurance plans. Coverage varies by plan; our team will help verify benefits and discuss any out-of-pocket costs. Questions? Call 832-581-2277.
Urgent care handles minor illnesses/injuries. ERs have advanced imaging, lab, medications, and emergency physicians for time-sensitive or severe conditions (e.g., chest pain, severe abdominal pain, serious injury, difficulty breathing).
Yes. If inpatient care or surgery is required, we coordinate a direct transfer to the appropriate hospital.
Times vary by condition and testing, but our no-wait intake and on-site diagnostics help you get answers and treatment as quickly as possible.