Straightening of the physiological curvature of the neck can be caused by poor posture or degeneration of the cervical intervertebral discs, etc. It can be restored through daily functional exercises or surgery, and if accompanied by pain, it can be relieved by medications such as ibuprofen. 1. Poor posture: Long-term sitting posture, poor sleeping posture, and frequent bowing of the head may cause straightening of the physiological curvature of the neck, leading to fatigue of the neck muscles, changes in the intervertebral discs and compression of the nerves, which may result in pain, etc. The pain can be relieved by changing the sitting or sleeping posture. The physiological curvature of the neck can be restored gradually by changing the sitting and sleeping postures, shortening the time of each bowing of the head, wearing a neck brace, and carrying out functional exercises for the shoulder and neck muscles. 2. Degeneration of cervical intervertebral discs: The cervical intervertebral discs degenerate due to ageing and long-term strain injuries caused by poor posture, resulting in straightening of the physiological curvature of the neck, pain in the neck and back, and restriction of activities. Ibuprofen and other medications can be used to reduce inflammation and relieve pain, and surgery can be used to correct severe nerve compression symptoms. If the symptoms cannot be relieved or the pain affects daily activities, patients need to go to the hospital for timely diagnosis and treatment to avoid affecting the quality of life. If you need to use drugs, please use under the guidance of a physician.