Hi, what could this be?,, I m 24yo female with a hard lump on my neck above the collar bone, I noticed this almost 2 years ago and had scans etc done, had a needle biopsy which showed up inconclusive so was operated to remove it, ended with the consultant puzzled by it but they weren t concerned, it came straight back after the surgery, now recently I ve noticed another ( possibly feels like it s attached to the original one ) I m also waking up most nights with coughing fits, having bad headaches and back pain.....