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Swollen Lymph Nodes in the Neck - Causes and Treatment

Swollen lymph nodes in the neck are often a sign of infection or inflammation. Learn about causes, symptoms, and when to see a doctor.

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Things worth knowing about "swollen lymph nodes in the neck"

Swollen lymph nodes in the neck are often a sign of infection or inflammation. Learn about causes, symptoms, and when to see a doctor.

What Are Swollen Lymph Nodes in the Neck?

Lymph nodes are small, bean-shaped organs of the immune system distributed throughout the body. The neck area contains a particularly high concentration of lymph nodes. They filter lymph fluid and help fight pathogens such as bacteria and viruses. When lymph nodes in the neck become enlarged, this is medically referred to as cervical lymphadenopathy. It is often a sign that the immune system is actively responding to an illness or infection.

Causes

Swollen lymph nodes in the neck can have many different causes. The most common include:

Upper respiratory tract infections: Colds, flu, or tonsillitis are among the most frequent triggers.
Bacterial infections: For example, strep throat or scarlet fever caused by Streptococcus bacteria.
Viral infections: Infectious mononucleosis (also known as glandular fever, caused by the Epstein-Barr virus) typically causes significantly swollen cervical lymph nodes.
Dental or oral infections: Tooth abscesses or gum disease can also cause lymph node swelling in the neck region.
Skin infections of the head and neck: Wounds or infections of the scalp or face may affect nearby lymph nodes.
Autoimmune conditions: Diseases such as lupus erythematosus or rheumatoid arthritis can also cause lymph node enlargement.
Rarer causes: In uncommon cases, swollen lymph nodes may indicate lymphoma, other cancers, or metastases.

Symptoms

In addition to visible or palpable swelling, other symptoms may occur depending on the underlying condition:

Tenderness or pain when touching the lymph nodes
Redness or warmth over the swollen nodes
Fever and general feeling of illness
Sore throat and difficulty swallowing
Runny nose, cough, or other cold symptoms
Fatigue and exhaustion

When to See a Doctor

In many cases, swollen lymph nodes in the neck resolve on their own once the underlying infection has cleared. However, medical attention is recommended if:

the swelling persists for more than two to four weeks
the lymph nodes are painless, very hard, or fixed (not movable)
the swelling increases rapidly
high fever, unintentional weight loss, or night sweats are also present
swelling occurs at multiple sites simultaneously
no obvious infection can be identified as the cause

Diagnosis

A healthcare provider will take a thorough medical history and physically examine the lymph nodes. Depending on the suspected diagnosis, further investigations may include:

Blood tests: Measurement of inflammatory markers (e.g., CRP, ESR), complete blood count, and specific serological tests if a particular condition is suspected.
Ultrasound: Imaging of the lymph nodes to assess their size, shape, and internal structure.
Biopsy: In unclear cases, a tissue sample from the lymph node may be required to rule out malignancy.

Treatment

Treatment depends on the underlying cause of the lymph node swelling:

Bacterial infections: Treated with antibiotics as prescribed by a doctor.
Viral infections: Symptomatic treatment, such as pain relief and rest, as antibiotics are not effective against viruses.
Autoimmune conditions: Specific therapy depending on the disease, often involving anti-inflammatory medications.
Cancer-related causes: Oncological treatment based on the exact diagnosis (e.g., chemotherapy, radiation therapy, surgery).

Mild discomfort can be relieved with cool compresses. Pain relievers such as ibuprofen or paracetamol can be taken if needed, but always in consultation with a healthcare professional.

References

World Health Organization (WHO): Lymphadenopathy - Clinical Overview. Geneva, 2022. Available at: https://www.who.int
Ferri, F.F.: Ferri's Clinical Advisor 2023. Philadelphia: Elsevier, 2023.
National Health Service (NHS): Swollen glands. London, 2023. Available at: https://www.nhs.uk/conditions/swollen-glands/

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