Hi there and thank you for the question and for the request.
Without any rememberance of trauma, there are several causes that I will list. Some may or may not apply to you in your case but for the sake of covering all the bases, I'll list everything.
First thing that comes to mind is possible lymph nodes that are inflammed. Lymph nodes help to filter bacteria and infection. Lymph nodes can also become sore for idiopathic reasons (no reason at all). Also, areas of inflammation on the scalp from skin disorders are a possibility. New hair products, a change in hair routine (washing frequency, or products), even the way you style your hair can cause soreness (for example, combing your hair a different way or wearing a ponytail and you normally don't wear a ponytail etc)....even an insect bite or tick bite. Chiggers can embed themselves into your scalp and while the itching may be to a minimum, the soreness they leave behind can be felt.
Usually for issues that are non-specific (ones that don't point to a specific disease or problem) will most times resolve in time on their own. However, if you feel any of the above pertains to your situation or circumstances, let me know and we can talk about it in more depth. Feel free to respond if needed.
Thank you so much for your detailed response. I just want to give an extra clarification to see if it narrows the possibilities; it usually doesn't hurt until I touch certain areas, then it hurts during touching and leaves a lingering pain for a short duration. I look forward to your response, then I think that should do it. Thanks again.
Thanks very much for your time and expert information.
I'm happy to pay for your service.