Lymphoma cause overall ?

Do some sorts of lymphoma cause generalize lymphadenopathy like armpits, neck, throat, groin, etc.? or are only the nodes were the cancer lies swollen? Im wondering because I have swollen lymph nodes almost everywhere, at first they were soft, mobile but still painless most of the time, now they still remain painless but some nodes instead of being circular lumps or marble like nodes they are beginning to get clumpy. Almost like some nodes are joining together forming hard clusters of nodes. Most of them are hard now, most still mobile but some less than others. My concern is out of nowhere they got harder and started getting lumpy (the actually node it self feels like a small peanut with shell and all. Im not sure if im explaining myself correctly but my question is does lymphoma cause enlargement in the whole lymphatic system or only where the malignancy is located? The harder ones and larger ones all are on the right side. I have a right sided varicocele (varicose vein on ). Supposedly that means I have poor flow in my superior vena cava most likely due to and obstruction, m or cancer.Still hasnt been evaluated but could lymphoma cause obstruction of the superior vena cava? On my whole right side I feel pain in my neck, back, right arm, sometimes my head and chest. I have a doctors appointment on tuesday. hopefully all goes well. I also have low lymphocytes, neutrophils and some other cells i dont know right now, i would have to see the paper. Thank you