lymphatic disorders
heart and blood vessel disorders
Swollen Lymph Nodes
In most cases, the cause is an obvious nearby skin or tissue infection or a harmless viral infection that goes away on its own. Testing is usually needed when there are warning signs, when other symptoms or risk factors suggest certain specific disorders, or when widespread lymph node swelling has no apparent cause. When lymph node swelling does not resolve within 3 or 4 weeks, a biopsy may be needed. 