Brief Answer:
No reason for panic

Detailed Answer:
I read your question carefully and I understand your concern.

Naturally it is hard to state what exactly that spot was without being able to examine it myself.

However in terms of whether there is something to worry I do not think there is any reason for that. I suppose you find it worrying in the sense of whether it could represent some condition involving the brain. That is not the case though. The brain is encased inside the thick bony skull and its lesions do not manifest with spots which can be touched and be painful to touch. It has other symptoms related to brain dysfunction (weakness of the limbs, balance and coordination issues, behavior changes etc). There can be pain but in the form of more diffuse headache than a single spot, usually with nausea and vomiting.

So most probably it was the case of a slightly enlarged lymph node or a skin issue such as infection, allergic reaction etc. The fact that it went away so easily confirms there is no reason to worry, none of those are dangerous.

I remain at your diposal for other questions.

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