Acute lymphadenitis is a rapid, usually painful enlargement of lymph nodes triggered by bacterial or viral infection. Typical features develop over hours to days and include: Swollen, tender nodeA single node or regional group suddenly enlarges to pea-to-walnut size; the overlying skin feels hot and is painful to touch. Red, warm skinThe surface becomes flushed and edematous as inflammation spreads from node to subcutaneous tissue. Fluctuant massCentral liquefaction produces a soft, “water-bed” sensation, indicating abscess formation. Fever and chillsTemperature often rises to 38–39 °C with rigors, malaise, and night sweats. Spontaneous drainageIf untreated, the abscess may rupture, releasing creamy pus... Learn more