Hello. Unilateral isolated lymph
node enlargement can be due to a variety of neoplastic/ non-neoplastic, infective or non- infective causes. They can be ruled out by step-wise performance of investigations as routine blood investigations, Montoux's test and most importantly an FNAC which will actually reveal the nature of cells forming the enlargement. It would definitely not be a simple pyogenic enlargement as it would have healed with broad spectrum antibiotics. So, you need to visit a physician who will guide you on these investigations and then decide the plan of action. take care.