Reliable sources for medical images of swollen lymph nodes include Mayo Clinic, eMedicineHealth, WebMD, Healthline and MedicineNet, according to their websites. Located throughout the body and round or oval in shape, lymph nodes are part of the immune system and help to fight off infection, states MedicineNet.
Infections are the most-common cause of swollen lymph nodes, according to MedicineNet. Cancer and inflammation caused by diseases such as lupus and rheumatoid arthritis also cause swollen lymph nodes. In some cases, swollen lymph nodes occur naturally.
Treatment for swollen lymph nodes depends entirely on the cause, notes eMedicineHealth. If an infection is present, the patient may require antiviral medications or antibiotics.