Enlarged Lymph Node After Infection

A lymph node can become enlarged due to an infection and it may remain enlarged or swollen after the infection has been treated. Patients should see a doctor if their lymph nodes remain swollen after an infection has disappeared.

Infection Causes

• Lymph nodes can enlarge during a common infection such as strep throat, measles or an ear infection, according to the Mayo Clinic. Mononucleosis, tuberculosis and sexually transmitted diseases can also cause lymph nodes to swell.

Other Causes

• Lymph nodes can become swollen from immune system disorders such as rheumatoid arthritis, lupus or AIDS. Patients with lymphoma, leukemia or other forms of cancer can develop enlarged lymph nodes.

Symptoms

• Individuals with swollen lymph nodes may notice tender and enlarged areas in the head and neck area, groin area and armpits, according to the Mayo Clinic. The skin around swollen lymph nodes may become red.

When to See a Doctor

• Patients should see a doctor if their lymph nodes remain enlarged for more than two weeks, if the nodes are warm to the touch or if a fever, a sore throat or breathing difficulties are present.

Treatment

• Patients with a lingering bacterial infection may be treated with an antibiotic and they may use an over-the-counter pain reliever, according to the Mayo Clinic. When enlarged lymph nodes are caused by an immune system disorder or cancer, the underlying cause must be treated by a physician.