Diagnosis
To diagnose lymphangitis, your doctor will perform a physical exam. They'll feel your lymph nodes to check for swelling. Your doctor may also order tests such as a biopsy to reveal the cause of the swelling or a blood culture to see if the infection is present in your blood.
The lymph system is a network of lymph nodes, lymph ducts, lymph vessels, and organs that produce and move a fluid called lymph from tissues to the bloodstream. Lymphangitis most often results from an acute streptococcal infection of the skin. Less often, it is caused by a staphylococcal infection.