Hello I have studied your case All your symptoms suggest systemic infection leading to swelling and enlarged lymph node. Enlarged lump needs proper evaluation ,aspiration and excision. Most common reason for enlarged lump is usually infection, so we can start antibiotic regime and look for results. You may need to investigate in form of complete blood count, ESR, CRP, tuberculin test, and Fine needle aspiration cytology or open biopsy. There could be possibility of infection like Tuberculosis or sarcoidosis. Hope this answers your query. If you have additional questions or follow up queries then please do not hesitate in writing to us. I will be happy to answer your queries. Wishing you good health. Take care.