Could you have cancer if you have a pea-sized lump on the lower left back of your neck that has been there for a few months or could it be a symptom of another ailment?
If it's a skin discoloration with irregular shape and other
signs of skin cancer, he/she should see a physician. If it's a lump
under the skin, and there isn't really much to see, it's probably a
subcutaneous cyst, meaning an oil gland that got closed off and
grows internally. If that's the case, it's not a big deal. Either
way, if you're concerned, see a doctor to be reassured or treated
as the case may be.