I'm really worried about my mother. She's had this swelling on her neck for about four months now, and while it doesn't hurt or irritate her, it's gotten bigger. We've done a bunch of tests, including something called an FNAC, and found out it's a gland from TB. Shes been on TB treatment for three months, but she's started feeling pain because now there's pus in that node. The doctor has already removed the pus twice this month, but the swelling doesn't seem to be getting any better, and now she has a fever that goes up to between 100 and 101 in the evening. Plus, she's lost her appetite and only manages to eat 1 or 2 chapatis per meal. I'm starting to wonder if she might need surgery to get rid of the pus completely. If that's the case, what kind of procedure would it involve?