IMMUNOLOGY

Detailed explanation-1: -Lymph nodes play an important part in the body’s defense against infection. Swelling might occur even if the infection is trivial or not apparent. Swelling of lymph nodes generally results from localized or systemic infection, abscess formation, or malignancy.

Detailed explanation-2: -A normal lymph node is small and firm. When lymph nodes become infected, they usually increase in size, become tender, and may be felt in other areas of your body during a physical exam. Infections that spread to lymph nodes are usually caused by bacteria, a virus, or a fungus.

Detailed explanation-3: -Your lymph nodes get larger when more blood cells come to fight off an invading infection. They all essentially pile in, causing pressure and swelling. Often, the lymph nodes that swell will be close to the infection’s site. That means if you have strep throat, you may develop swollen lymph nodes in your neck.

Detailed explanation-4: -What to Expect: After the infection is gone, the nodes slowly return to normal size. This may take 2 to 4 weeks.

Detailed explanation-5: -ear infection. sinus infection. the flu. strep throat. mononucleosis (mono) tooth infection, included an abscessed tooth. skin infection. HIV.