question: I have a large bump on the back of my head, my family doctor thinks it just a swollen lymph node, although it is very painful, espically after I have smoke pot, although I when I put to and to together i stoped, while normally if i hadnt smoked in a fewdays or a week, it would bairly hurt, and the swelling would almost be gone but now it feels swollen more than ever and hurts very badly with a shotting pain down my back raiding from the lymph node, and I have a headach that hurts very badly sitting right behind my forhead.