What is the role of lymph nodes in the immune system?
Lymph nodes filter lymphatic fluid, trapping bacteria, viruses, and other foreign particles. They contain lymphocytes that identify and attack pathogens, helping initiate and regulate immune responses. By producing antibodies and activating killer cells, lymph nodes play a crucial role in protecting the body against infections.
What causes swollen lymph nodes?
Swollen lymph nodes are commonly caused by infections, such as the common cold, influenza, or strep throat. They may also enlarge due to autoimmune diseases like lupus, inflammatory conditions, or cancers such as lymphoma. Sometimes, medication side effects or localized infections can result in swelling.
How can swollen lymph nodes be treated?
Swollen lymph nodes often resolve without treatment if caused by viral infections. Rest, warm compresses, and over-the-counter pain relievers like ibuprofen or acetaminophen can alleviate symptoms. If bacterial infection is the cause, antibiotics may be prescribed. Persistent swelling or severe symptoms should be evaluated by a healthcare professional.
What does it mean if lymph nodes are hard or do not shrink?
Hard or persistently enlarged lymph nodes may indicate underlying conditions such as infections, immune disorders, or malignancies. If they remain unchanged, it is important to seek medical evaluation to determine the cause and initiate appropriate treatment.
Are swollen lymph nodes always a sign of infection?
Swollen lymph nodes are often a sign of infection, but they can also indicate other conditions such as autoimmune diseases, inflammation, or certain cancers. They may swell due to localized issues like an injury or systemic conditions. Persistent or unexplained swelling should be evaluated by a healthcare professional.