Can vessels get overstretched or can something dangerous happen to vessels if spine gets straighter and curve reversed? Many areas feel pulse feeling

Let me explain. The only area could happen in the neck area because the vessels pass through the side of the vertebrae.
Tight muscles? You may have some tight muscles in spasm in your back, which may make arterial pulsation within the muscles perceptible for you. If you haven't had physical therapy and/or massage therapy, this should be a good time to start.