How Painful Is A Spinal Needle?

Pain threshold is the lowest value of stress tissue response caused by pain stimulus, which is the meaning of critical value. In other words, it is the threshold at which the system does not respond to small stimuli but reacts violently when it exceeds a certain limit.
The pain threshold is the maximum ability of the body to withstand external stimuli. The higher the pain threshold, the stronger the ability to withstand pain, and the weaker the vice versa. The increase of pain threshold is a normal regulation mechanism of the body, which is a reasonable and beneficial regulation. But the increase in the pain threshold does not mean that manipulative stimulation should be enhanced accordingly if the amount of stimulation is beyond the normal range, but has not reached the pain threshold, it is likely to be hurt in the case of pain. Everyone is biologically different. Some people feel pain from injections, while others feel less pain, because everyone has a different pain threshold.