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Sepsis
Reviewed by Medicinsk Expert•Last updated: 2026-10-22•Infections

Sepsis

Sepsis is a life-threatening medical emergency caused by the body's extreme response to an infection, requiring rapid diagnosis and treatment to prevent organ failure.

What is sepsis?

Sepsis is the body's overactive and extreme response to an infection. Without quick treatment, it can lead to tissue damage, organ failure, and death.

Causes and Risk Factors

Sepsis occurs when an existing infection triggers a chain reaction throughout the body. While bacterial infections are the most common cause, other infections can also trigger it. It often originates in the lungs, stomach, kidneys, or bladder, or from a small infected cut or post-surgical infection.

While anyone can develop sepsis, those at higher risk include:

  • Adults 65 or older
  • People with chronic conditions like diabetes, lung disease, cancer, and kidney disease
  • People with weakened immune systems
  • Pregnant women
  • Children younger than one

Symptoms

Seek medical care right away if you experience:

  • Rapid breathing and heart rate
  • Shortness of breath
  • Confusion or disorientation
  • Extreme pain or discomfort
  • Fever, shivering, or feeling very cold
  • Clammy or sweaty skin

Diagnosis and Treatment

Sepsis can be difficult to diagnose in early stages because symptoms often mimic other conditions. Providers will typically perform a physical exam, review medical history, order lab tests to check for infection or organ damage, and may use imaging like X-rays or CT scans.

Treatment must be immediate and usually includes:

  • Antibiotics
  • Maintaining blood flow to organs via oxygen and IV fluids
  • Treating the source of the infection
  • Medicines to increase blood pressure

In serious cases, patients may require kidney dialysis, a breathing tube, or surgery to remove damaged tissue.

Prevention

To prevent sepsis, focus on preventing infections:

  • Manage chronic health conditions.
  • Get recommended vaccines.
  • Practice good hygiene, such as handwashing.
  • Keep cuts clean and covered until healed.

Frequently Asked Questions

Diagnosis is clinical, but providers typically order a blood panel that includes a complete blood count (CBC) to check for abnormal white blood cell levels, a lactate test to measure tissue oxygenation (elevated lactate is a strong marker for sepsis), and a blood culture to identify the specific bacteria. Additional tests may include a basic metabolic panel to assess kidney and liver function. While blood cultures take 24 to 48 hours to grow, the initial blood gas and lactate results can be available within 15 to 30 minutes. Treatment with antibiotics and fluids often begins immediately based on clinical suspicion, without waiting for final culture results, to prevent further organ damage.
Recovery from sepsis can take weeks to months, and many survivors experience "post-sepsis syndrome," which includes fatigue, cognitive difficulties (often described as brain fog), and reduced muscle strength. Some patients may have long-term organ damage, such as chronic kidney disease or reduced lung function, depending on the severity of the initial episode. Rehabilitation often involves physical therapy to rebuild strength and occupational therapy to regain daily living skills. Mental health support is also important, as survivors frequently experience anxiety, depression, or PTSD following their critical illness. Regular follow-up with a primary care provider is essential to monitor for any lingering organ dysfunction and to manage these long-term symptoms.
High-risk groups include adults over 65, infants under one year, pregnant women, and individuals with chronic conditions such as diabetes, kidney disease, liver disease, or those with compromised immune systems due to cancer or HIV. To prevent sepsis, these individuals should aggressively manage their chronic conditions, keep vaccinations up to date (including influenza and pneumococcal vaccines), and practice strict wound care to prevent skin infections. It is also crucial to seek prompt medical attention for any sign of infection, such as a fever, redness, or swelling, rather than waiting for it to resolve on its own, as early treatment of the source infection is the most effective way to prevent it from progressing to sepsis.
The key differentiator is the systemic nature of the response. While a local infection (like a UTI or skin abscess) causes localized pain or discomfort, sepsis involves a whole-body inflammatory response. Look for a combination of rapid heart rate, rapid breathing, and new-onset confusion or disorientation, even if the original infection seems minor. A critical red flag is "feeling like you are going to die" or extreme restlessness, which is a common subjective report from patients in early sepsis. If you have an existing infection and suddenly develop confusion, clammy skin, or a significant drop in blood pressure, treat it as a medical emergency and seek immediate care, as sepsis can progress to organ failure within hours.
Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.

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