<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hello, Ive had a single swollen groin lymph node for four months. The node is small but painful and the back of my upper leg is painful as well. I had a doctor take a look at it and he said he did feel a chain of shoddy nodes. Im worried that this could be lymphoma. The pain is hot and the back of my leg feels as though Ive pulled a muscle although I havent. Any help would be greatly appreciated.  <response>: Thanks to ChatDoctorIcan understand your problem dont worry, swollen lymph nodes in groin region for long time due to chronic infection I would like to know whether you used any antibiotics and analgesics just undergo once ultrasound in groin region it will suggest you the diagnosis . Once CBP, ESR TO BE done better .if above measures does not indicate anything have a biopsy once of that swollen lymph nodes dont worry use antibiotic and analgesic for 5 days it may show the improvement in your case. Ok 