my husband has a knot on the back, left side, of his neck.  Right below the hairline. The surrounding area of the scalp/head is very tender to the touch.  he is 62. he has noticed it for 2 days.  he initially was feeling sluggish, like he was getting sick.  no dizziness or numbness
Hello, * Likely to be due to soft tissue lesion as a sebaceous cyst or else with secondary bacterial infection causing pain on touch. * If you can provide me a photo picture of the same in private consultation, I can guide further precisely in this topic. Hope I have answered your query. Let me know if I can assist you further. Take care Chat Doctor.  Patel, General Surgeon