DD has swollen lymph nodes at the back of her neck since august, one you can really feel and there are 2 below it that is small. She had blood work done including peripheral smear and ultrasound. Ultrasound says the nodes are around 1.4 cm x 0.7 (biggest). I am kind of hesitant to do a biopsy as it might be too invasive for her as she is not having any symptoms and not feeling sick in any way. She had persistent allergic rhinitis back then but she has been given meds for that and is a lot better now, just that the nodes are still there. Any thoughts?