Bumps On Scalp, Redness, Growing In Size, Yellow Pus Discharge, Tiredness. Cure?

my wife gets bumps on her head that dont go away . We have used a steril needle to puncure it and sqeeze out a white gue . Done this befor worked well , and bumps always go away. This time it was fine for a few days , maybe a week now its really big and very red. I sqweezed it last night and alot of yellowesh pus came out. Its hard to tell with her hair but it looks like there are red lines starting to run out from it .She also said there is some tinderness down to her neck?