Chronic infections, such as lupus, rheumatoid arthritis, and Sjogren's syndromeObesitySymptomsSymptoms include: Painless swelling of the neck, underarm, groin, or any other lymph node-bearing regions of the bodyUnexplained feverProfuse sweatingConstant fatigueUnexplained weight lossItchy skin, especially on the legs and feetRed patches on the skinChest pain or shortness of breathBruisingDiagnosis