Most postoperative complications occur within the first 30 days and are treatable when caught early. A wound infection at 48 hours responds to oral antibiotics but the same infection a week later may need longer treatment. A pulmonary embolism (blood clot in the lung) at first breathlessness is manageable but one presenting in cardiac arrest is not. At CARE Hospitals, the post-operative emergency pathway assesses complications rapidly.

What are Post Surgery Complications?

Surgery resolves the immediate problem, but recovery is not always simple. In some patients, the body's response to the procedure itself introduces new complications. These complications do not affect every patient and most are manageable when caught early. A post-surgery complication is any adverse event from an operation. Complications are:

• Early (within 24 to 72 hours) complications: Haemorrhage, haematoma (blood collection under the wound), and respiratory compromise. 
• Intermediate (within two weeks) complications: Surgical site infection (SSI), deep vein thrombosis (blood clots in leg veins), pulmonary embolism (clots in the lungs), and anastomotic leak (a break in a bowel join). 
• Late (beyond two weeks) complications: Wound dehiscence (wound edges separating), incisional hernia, and nerve damage.

Common Causes of Post-Surgery Complications

Most complications stem from a combination of surgical, anaesthetic, and patient factors. They are:

• Reduced mobility: Immobility slows venous flow, allowing clots (DVT and PE) to form
• Surgical site contamination: Bacteria might enter the wound and risk is higher in bowel surgery & diabetic patients
• Haemostasis failure: Inadequate intraoperative bleeding control or blood thinners restarted too early can cause haematoma or haemorrhage
• Anastomotic tension or ischaemia: A bowel join under tension or with poor blood supply leaks in the first five to seven post-operative days
• Respiratory depression: Residual anaesthetic and opioid effects cause atelectasis (collapse of small airways)
• Co-morbidities: Diabetes, obesity, smoking and steroids impair wound healing and infection defence.

Signs and Symptoms of Post-Surgery Complications

Knowing which symptoms are expected and which are warning signs matters during home recovery.

• Fever above 38°C: Low-grade temperature in the first 24 to 48 hours is normal but fever persisting beyond 48 hours or rising after initial improvement suggests infection
• Wound redness, warmth or pus: Normal wounds are slightly pink and dry; spreading redness, warmth, cloudy discharge, or odour indicates surgical site infection
• Wound dehiscence (edges separating): Small separations may be managed with dressings whereas full-thickness openings exposing deeper tissue need emergency assessment.
• Worsening pain: Most surgical pain improves daily; pain that gets worse after initial improvement suggests infection, haematoma or anastomotic leak
• Swollen, red or tender calf: Possible DVT; any unexplained calf swelling after surgery needs a Doppler ultrasound
• Breathlessness, chest pain or rapid heart rate: Possible PE; it can present from day three postoperatively
• Abdominal pain, distension, or fever after bowel surgery: Anastomotic leak or peritonitis (infection of the abdominal lining); a medical emergency
• Confusion or reduced consciousness: Sepsis (body-wide infection response) that can deteriorate to septic shock (dangerously low blood pressure) within hours.

First Aid for Post-Surgery Complications 

Prompt action before reaching hospital limits reduces complication severity:

• Stop bleeding from the wound: Apply firm, direct pressure with a clean cloth for at least 10 minutes without releasing. Do not remove soaked dressings; add more on top.
• Do not interfere with the wound: Do not clean inside the wound, push edges together, or remove drains or sutures. Cover with a clean dressing and go to the hospital.
• Stay upright if breathless: Sit upright or lean forward - this opens the airways. Call emergency services immediately if breathlessness is severe or accompanied by chest pain.
• Hydrate if not contraindicated: If fever is present and fluids are tolerated encourage oral hydration. No food or drink if vomiting or if emergency surgery may be needed.
• Do not stop prescribed medications without advice: Continue prescribed medications unless specifically told to stop. Avoid NSAIDs (anti-inflammatory tablets) without checking with a doctor as they raise bleeding risk post-operatively.
• Go to emergency care: Heavy bleeding, breathlessness, chest pain, wound separation, or infection with fever all need a same-day emergency assessment.

When to Seek Emergency Care for Post-Surgery Complications

These signs after any operation require same-day emergency assessment:

• Heavy or uncontrolled wound bleeding
• Wound opening particularly if deeper structures are visible
• Fever above 38.5°C beyond 48 hours, or any fever with rigours (uncontrollable shivering)
• Wound redness spreading more than 2 cm from the edge, or pus
• Breathlessness, chest pain, or coughing blood 
• Calf pain, swelling, or redness 
• Abdominal pain or distension after bowel or abdominal surgery 
• Confusion, reduced consciousness, or heart rate above 100 at rest 
• Inability to pass urine for more than eight hours after catheter removal.

Emergency Treatment at the Hospital for Post-Surgery Complications

Assessment is rapid and parallel and treatment follows the complication identified:

• Assessment and vital signs: Doctors evaluate symptoms, vital signs, surgical history, and the severity of the complication.
• Blood tests: Full blood count, CRP (inflammation marker), blood cultures, lactate and kidney function taken urgently.
• Imaging: Doctors perform chest X-ray for pneumonia, effusion, or atelectasis; CTPA for PE; CT abdomen for anastomotic leak; Doppler ultrasound for DVT.
• Wound management: Superficial infections managed with antibiotics after swab cultures. On the other hand deep infections or dehiscence may need surgical washout.
• DVT and PE treatment: LMWH then oral anticoagulants for three to six months. Massive PE is treated with thrombolysis (clot dissolving drug) or surgical embolectomy.
• Sepsis protocol: Cultures, IV antibiotics, IV fluids, lactate, and urinary catheter. ICU if vasopressors (blood pressure drugs) are needed.
• Return to the theatre: Haemorrhage, anastomotic leak, bowel perforation, and dehiscence with exposed viscera (internal organs) require urgent return to theatre.

What Not to Do

These actions worsen outcomes or delay treatment:

• Do not ignore worsening pain 
• Do not dismiss fever beyond 48 hours 
• Do not clean inside the wound or push edges together at home 
• Do not take NSAIDs without checking with your doctor as they increase bleeding and can damage the kidneys post-operatively
• Do not stop anticoagulant (blood thinner) medication without advice.

Conclusion

Most patients recover from surgery without major issues, but complications can occasionally develop. Post-surgery complications follow a recognisable timeline and respond to early intervention. At CARE Hospitals, post-operative patients receive the same urgency as any acute presentation including vital signs, blood tests, imaging, and escalation to the surgical team without delay when return to theatre is needed.

FAQs

1. What are the common complications after surgery?

Surgical site infection, haematoma, DVT, PE, anastomotic leak, wound dehiscence, urinary retention and sepsis - most occur in the first two weeks and are treatable when identified early.

2. When should I seek emergency care after surgery?

Heavy bleeding, breathlessness, chest pain, persistent fever, wound opening, calf swelling, abdominal pain after bowel surgery or confusion - all require same-day emergency assessment.

3. Is a fever after surgery normal?

Low-grade temperature in the first 24 to 48 hours is normal but a fever persisting beyond 48 hours or accompanied by rigours (uncontrollable shivering) indicates possible infection.

4. How do I know if my wound is healing properly?

A healing wound is slightly pink, dry or has a little clear fluid, and becomes less painful each day. A spreading redness, warmth, pus or worsening pain indicates infection.

5. What should I do if there is bleeding after surgery?

Apply firm pressure with a clean cloth for at least 10 minutes and add more dressing if soaked through. Go to the hospital if bleeding does not stop.

6. Can breathing difficulty occur after surgery?

Yes breathing difficulty causes include PE, pneumonia, atelectasis (airway collapse), pleural effusion (fluid around the lung), and residual anaesthetic effects. Any new breathlessness after surgery needs a same-day assessment.

7. What are the symptoms of blood clots after surgery?

Symptoms are:

• DVT: calf pain, swelling and warmth. 
• PE: breathlessness, chest pain, rapid heart rate, and sometimes coughing blood.

8. Is chest pain after surgery an emergency?

Yes post-operative chest pain can indicate PE, heart attack, pneumonia, or pneumothorax (collapsed lung).

9. How are post-surgery complications diagnosed?

Investigations include:

• Vital signs assessment
• Blood investigations like complete blood count, C-reactive protein (CRP), cultures and lactate levels to detect infection
• Chest X-ray to detect respiratory complications
• CT pulmonary angiography (CTPA) to detect pulmonary embolism
• Abdominal ultrasound for anastomotic leak
• Doppler for DVT.

10. Can post-surgery infections be treated easily?

Superficial infections caught early respond to antibiotics but deeper infections, abscesses (pockets of pus), or infected mesh may require surgical drainage. Early treatment consistently produces better outcomes.

11. What precautions should I take after surgery?

Precautions include:

• Walk as early as permitted.
• Keep wounds dry.
• Complete any antibiotic course.
• Avoid NSAIDs unless cleared.
• Wear compression stockings if prescribed.
• Attend all followup appointments.

12. How long does recovery take after surgical complications?

Recovery usually takes:

• Superficial infections resolve in one to two weeks.
• DVT requires three to six months of anticoagulation.
• Sepsis requiring ICU care may extend recovery to several months.

CARE Medical Team