Hello,
I had gone through your question carefully and i can understand your concern very well for your grand daughter.
I would like to probe you few questions like is there any signs of inflammation like
redness, swelling, etc., is it associated with pain or not, whether any kind of discharge from that knot or not. If you can upload an image of that knot, then it will be greater helpful for me to give you perfect suggestions to you. You can upload an image and come back to me directly anytime, i will be happy to guide you further.
I would suggest you to do some blood examinations like CBC with
ESR,
creatinine and blood sugar. As there is high grade
fever for last five days, antibiotics are must for empirical treatment and along with that
paracetamol should also be taken to take care of fever.
Hope this will help you and come back to me with the image and reports, so that i can guide you fully in right direction.