I80-I89: Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified

I88: Nonspecific lymphadenitis

Nonspecific lymphadenitis is a common type of inflammation affecting the lymph nodes, the small, kidney-shaped structures that form a part of the body's immune system. It is referred to as 'nonspecific' because the inflammation is not due to a specific underlying disease. With this condition, your lymph nodes may become swollen, tender, and sometimes painful, typically due to an infection. The infection can be caused by various viruses, bacteria, or other microorganisms entering the body, often by breathing, ingestion, or cuts in the skin. Nonspecific lymphadenitis can occur in just one area (localized) or it could affect many areas (generalized). It is a sign that your immune system is fighting off an infection and is usually not a cause for concern. The condition may resolve on its own once the underlying infection is addressed.