Bleeding after tonsillectomy
- Emergency
Any bleeding after a tonsillectomy, even a small amount that stops, is an emergency: the patient goes to hospital and ENT is called.
What it is
Bleeding is the main serious complication of tonsillectomy. Primary bleeding happens within 24 hours and is usually related to the operation itself; secondary bleeding happens later, most often around days 5 to 10 when the scab over the tonsil bed separates, and can occur up to about two weeks after surgery. A small «sentinel» bleed can come before a major one. Children hide blood loss: they swallow blood and keep a normal blood pressure until late.
How to recognise it
- Fresh red blood from the mouth or nose, or clots in the throat.
- Vomiting of dark blood or black stools from swallowed blood.
- Tachycardia, pallor, restlessness and cold hands in a child.
- A clot or active bleeding point in the tonsil fossa on examination with a good light.
Step-by-step management
- Advise patients and families before discharge: any bleeding means going to the nearest emergency department at once.
- On arrival: sit the patient up and leaning forward, let them spit blood out, suction, and give oxygen.
- Insert intravenous access, send full blood count, blood group and crossmatch and coagulation tests, and start fluids.
- Call ENT and anaesthesia early; keep the patient nil by mouth.
- Small bleeds or clots may settle with observation and local measures; tranexamic acid is used in some protocols.
- Ongoing or heavy bleeding goes to theatre for haemostasis under general anaesthesia; transfuse as needed.
- After control, admit for observation, and check for a bleeding disorder if the history suggests one.
Red flags
- Active bleeding that does not stop, or recurrent bleeding.
- Tachycardia, pallor, drowsiness or low blood pressure.
- Vomiting of large amounts of blood.
- Airway compromise from blood or clots.
- Known bleeding disorder or anticoagulant use.
Next step / Initial management
- Workup: full blood count, blood group and crossmatch, coagulation tests; review drugs and family history of bleeding.
- First-line: resuscitation, observation and local measures; tranexamic acid in some protocols; surgical haemostasis in theatre if bleeding persists.
- Refer as an emergency, the same moment, to ENT any bleeding after tonsillectomy, including a small bleed that has stopped.
- Refer to haematology (routine or urgent according to severity) when a bleeding disorder is suspected.
Test yourself
Think of the answer, then tap the question to see it.
Seven days after tonsillectomy a 6-year-old spat some blood at home; it has stopped. What should happen?
Go to the emergency department and be seen by ENT. Even a small bleed that stops can precede a major one; the child is observed with blood tests and IV access.
When does secondary post-tonsillectomy bleeding typically occur and why?
After the first 24 hours, most often around days 5–10, when the scab over the tonsil bed separates, sometimes with infection.
Why can blood loss be underestimated in a child after tonsillectomy?
Children swallow blood and compensate well: blood pressure stays normal until late, so watch for tachycardia, pallor, repeated swallowing and vomiting of blood.
Connections
Educational content; it does not replace a medical assessment and is not a clinical instruction. For a real case, follow current guidelines and specialist advice.
Sources: Tonsillectomy (StatPearls) (StatPearls Publishing, NCBI Bookshelf, 2026).
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Representative model, for educational purposes only.