Hi thanks for your question.
The bump you are having most probably could be a boil that is infected hair follicle with cellulitis
(infection of adjacent tissue).The lymph
nodes in neck are enlarged secondary to infection.You need a course of antibiotic and analgesic
anti inflammatory drugs(pain killers).Consult a physician or an ENT surgeon who may be able to examine you to determine what exactly this swelling is and accordingly he/she may prescribe you drugs.
Hope this answers your question.