Thanks for writing in.
There are a variety of causes that could be leading to your symptoms. One possibility is that you have cervical spondylosis
and the lump was secondary to the injury
sustained during the loss of consciousness
. This could be due to a muscle sprain
. The second possibility is that the lump itself is the primary cause of your symptoms. The nature of the lump needs to be verified with a proper physical examination and an investigation known as fine needle aspiration cytology. This lump would have probably exerted pressure on your carotid artery
and would have resulted in loss of consciousness.
I would suggest you see a general physician who can evaluate the nature of the lump and prescribe appropriate investigations. Once we have the results, we can take it ahead from there.
Hope this helps.