your spine
If you have a hard lump on the back of your neck, it could be a cyst. It could also be a form of a boil. If it does not go away, you should have it checked out by a physician.
It could be an imbedded tick.
Could be a lymph node.
The lump on the back of your neck would be a part of your spine.
A pea-sized lump on the back on the neck that moves could be a node. However, it is important to get nodes checked out to ensure that they are benign.
It sounds as if it could be a growth. You need to consult a physician, who may recommend that the lump be removed by surgery. (It's usually a simple, minor operation), tumor
A lump at the front of the neck could be inflamed lymph nodes, or an increase in one nodule of the thyroid gland which is a butterfly shaped organ in the neck belonging to the endocrine system. At the back of the neck a lump could be a muscle spasm or a problem with a spinal vertebra.
every guinea pig has a lump on the back of their neck, im not sure what it's for tho... but it's nothing to worry about
It could be a growth, so have a doctor examine it.
The large lump is more than likely a knot from the accident. It may be bruised tissue as well. It would be wise to consult a chiropractor for a specific diagnosis.
The lump on your neck on the inside of the jaw could be an infection. It is important that you seek medical attention ASAP.