### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
I had a procedure today where they were supposed to give me an injection in my neck to basically burn the nerve endings. I ended up with a golf ball size lump in my neck and the pain is worse. They did an ultrasound and it is fine. What could this be?

### output:

Hi, Dear,Thanks for your query to Chat Doctor virtual Clinic. I studied your query in all the details put forth by you. I understood your health concerns. More information is needed like-Was the compression bandage given for that lump or not?or the injection is left without any compression bandage? Cause of painful lump in neck post-Chemical denervation-Still from the data given from you, following causes need to be ruled out-Moslty your lumps seems to be- either a venous hematoma/ or arterial hematoma, post injection, due to the accidental blind puncture of the perineal vessels in the neck.-Ora effused injection material in perineal tissue, which is causing pain due to tissue irritation from the ablative chemical use for neck nerve chemical renovation.(Phenol or Alcohol). Still I would suggest you to take Second opinion from ER Surgeon as I don't have any first hand clinical information or a photograph of this lump. To confirm other causes I would hence suggest you to consult ER Surgeon or PCP doctor. But you need to be worried as it would complicate into infective and other problem associated with it. And act fast on the above suggestions, which helps you to plan treatment with your ER Surgeon. Hope this would resolve your query with full satisfaction. Welcome for any further query in this regard to ME by direct question at Chat Doctor. Write excellent review and hit thanks, to narrate your experience, which would improve my rating for many other visitors to Chat Doctor. Wishing you fast recovery. Have a good day. Chat Doctor. N. Senior Surgical Consultant. M.S. Genl-CVTS