Lymph node swelling can last for a few days or weeks, depending on the cause. It is important to identify the underlying cause of the swelling so that it can be treated correctly. Common causes of lymph node swelling include infections, an immune system disorder, or cancer. In rare cases, the swelling may be due to a blockage of the lymphatic system.
Infections
Infections, such as a cold or flu, can cause lymph node swelling. This is because the body's immune system is working to fight off the infection. The lymph nodes may become swollen and tender as a result. The swelling usually goes away within a few weeks after the infection has been treated.
Immune System Disorder
An immune system disorder, such as lupus or rheumatoid arthritis, can cause the lymph nodes to swell. This is because the immune system is overactive and attacking healthy tissue. The swollen lymph nodes may last for months or even years if the underlying disease is not treated.
Cancer
Cancer can also cause lymph node swelling. This is because cancer cells can spread to the lymph nodes and cause them to become enlarged. In some cases, the swelling may last for months or years, depending on how advanced the cancer is.
Blockage of the Lymphatic System
In rare cases, the lymphatic system may become blocked, which can cause the lymph nodes to swell. This is usually due to an infection or tumor that is blocking the flow of lymph fluid. The swelling may last for weeks or months, depending on the underlying cause.
In general, lymph node swelling will last for a few days or weeks, depending on the underlying cause. It is important to identify the cause of the swelling so that it can be treated appropriately. If the swelling lasts for more than a few weeks, it is important to see a doctor for further evaluation.