The pain threshold varies from person to person and is influenced by a variety of factors, such as age, gender, personality, psychological state, and the nature of the pain-causing stimulus. Clinically, some pain is caused by injurious stimuli, while others have unclear stimulus factors. Diagnosis of reduced pain threshold: A reduced pain threshold increases sensitivity to pain, and normal stimuli, such as changes in the physiological range of the body, may also cause pain. Over time, this can lead to changes in mood and dysfunction in the body, resulting in vascular disease, etc. Persistent muscle contraction leads to vasogenic headache and myotonic headache, causing pain to the patient. The pain threshold is a minimum limit of perceived pain, and people perceive pain when the pain level exceeds the pain threshold. The lowered pain threshold may be due to somatic or pathological causes, so it is important to pay attention to the differential diagnosis between each other. Clinically, some pain is caused by injurious stimuli, while others have unclear stimulus factors. A lowered pain threshold increases sensitivity to pain, and normal stimuli, such as changes in the physiological range of the body, can also be painful. Over time, this can lead to changes in mood and dysfunction in the body, leading to vascular disease, etc. Persistent muscle contraction leads to vasogenic headache and myotonic headache, causing pain to the patient. The elevated pain threshold also fails to feel pain or delayed response to stimuli beyond the pain threshold, and the disease cannot be detected and diagnosed early, and the opportunity for early treatment is lost. In short, an elevated or lowered pain threshold is detrimental to the human body. There are two kinds of pain thresholds most commonly used: one is the pain perception threshold ( customarily used as the pain threshold), which is the stimulus intensity that begins to know pain; and the other is called the pain tolerance threshold, which is the maximum intensity of pain that can be tolerated. The pain threshold varies individually and from site to site. Pain has a role in protecting the body from injury, i.e., nociception can serve as a warning of injury to the body and cause a series of defensive protective reactions in the body. However, the production of nociceptive impulses requires a certain level of stimulation intensity of pathogenic factors to produce, which is known as the pain threshold. The pain threshold is also divided into the pain perception threshold and the pain response threshold. The pain perception threshold is the smallest amount of stimulation that a subject can verbally report as painful, and the maximum amount of injurious stimulation that a subject can tolerate is called the pain tolerance threshold. The pain response threshold is the minimum amount of injurious stimulus required to elicit somatic reflexes (e.g., reflexes, yelling, etc.) and innominate reflexes (blood pressure, pulse, pupils, respiration, etc.). The internal fetal reflex is an objective indicator that is not governed by subjective will.