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Lymphangitis: Causes, Symptoms and Treatment

Lymphangitis is an inflammation of the lymphatic vessels, most commonly caused by bacterial infections. It typically presents as red streaks on the skin spreading from the site of infection.

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Things worth knowing about "Lymphangitis"

Lymphangitis is an inflammation of the lymphatic vessels, most commonly caused by bacterial infections. It typically presents as red streaks on the skin spreading from the site of infection.

What is Lymphangitis?

Lymphangitis is an inflammation of the lymphatic vessels, which are a key part of the immune and circulatory system. The lymphatic system transports fluid, waste products, and immune cells throughout the body. When pathogens enter the lymphatic vessels, an inflammatory response is triggered. Without timely treatment, lymphangitis can develop into a life-threatening condition.

Causes

Lymphangitis is most commonly caused by bacterial pathogens that enter the lymphatic system through wounds, insect bites, or skin infections.

Bacteria: The most frequent causative agents are streptococci (especially Streptococcus pyogenes) and staphylococci.
Fungal infections: Less commonly, fungi can also trigger lymphangitis.
Parasites: In tropical regions, the parasite Wuchereria bancrofti can cause a chronic form of lymphangitis known as lymphatic filariasis.
Wounds and skin infections: Injuries, boils (furuncles), or infected fingertips can serve as entry points for pathogens.

Symptoms

Symptoms of lymphangitis can develop rapidly and should be taken seriously:

Red streaks on the skin extending from the site of infection toward the nearest lymph nodes
Pain and tenderness along the affected lymphatic vessel
Swelling and warmth in the affected area
Enlarged lymph nodes (lymphadenopathy) near the site of inflammation
Systemic symptoms such as fever, chills, fatigue, and general malaise

The distinctive red streaks on the skin are a classic warning sign and require prompt medical attention, as the infection can rapidly progress to blood poisoning (sepsis).

Diagnosis

The diagnosis is typically made clinically based on the characteristic symptoms and physical examination. Additional investigations may include:

Blood tests: Elevated inflammatory markers (CRP, white blood cell count) indicate a bacterial infection.
Blood cultures: Performed if sepsis is suspected to identify the causative organism.
Wound swab: To identify the specific pathogen and guide antibiotic therapy.
Ultrasound: To assess the lymph nodes and surrounding tissue.

Treatment

Treatment depends on the underlying cause and severity of the condition.

Antibiotic Therapy

For bacterial infections, antibiotics are the primary treatment. Depending on the severity, they may be given orally or intravenously. Commonly used antibiotics include penicillin, amoxicillin, and cephalosporins.

General Measures

Rest and elevation of the affected limb
Cooling to reduce pain and swelling
Adequate fluid intake

Treatment of the Underlying Cause

The original entry point of the infection (e.g., a wound or boil) must also be treated, which may involve wound care or surgical drainage.

Inpatient Treatment

In severe cases, high fever, or suspected sepsis, hospitalization with intravenous antibiotic therapy is required.

Prognosis and Prevention

With timely treatment, lymphangitis usually resolves without complications. However, if left untreated, it can progress to life-threatening sepsis. Prevention includes careful wound care even for minor injuries and prompt treatment of any skin infections.

References

World Health Organization (WHO): Lymphatic Filariasis and Bacterial Skin Infections. www.who.int
Swartz, M.N.: Cellulitis and Subcutaneous Tissue Infections. In: Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases. Elsevier, current edition.
Stevens, D.L. et al.: Practice Guidelines for the Diagnosis and Management of Skin and Soft Tissue Infections. Clinical Infectious Diseases, 2014. doi:10.1093/cid/ciu296

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