I had a swollen lump on my neck. It came up really big and then went away. Then the next day the lump was back but up onto my check area. The swelling will come and go. One day it swelled up and I rubbed it and it caused me to to have dizziness, blurred vision, by BP shot up really high, pulse went to over 150, both my eyes turned red and just felt like I would pass out. I took a nitroglycerin and it helped a little. It started again later and I went to ER, they ran ekg, drew blood and did a chest xray. They said it was all normal and sent me home. I had another episode the next day and went to another ER, they repeated the EKG and sent me home. The lump will come and up and go away. But is never big when getting to see a doc. What could possible be going on with me? I just dont feel good and tired and out of breath all the time.