If the neck is sprained, it can produce different conditions depending on the severity of the sprain and the location of the sprain. If the sprain is only minor and involves only mild contusion of the soft tissues, there will be localized swelling and pain, and there may also be dysfunction of the neck. After braking and resting, localized topical medication that activates blood circulation and removes blood stasis, and also physical therapy, the symptoms can be relieved in a very short period of time, and the recovery time will not be very long. If the sprain is very serious, it can cause extensive soft tissue laceration or contusion, which may cause the small joints of the cervical vertebrae to be disorganized and misalignment of the cervical vertebrae to occur. In this case, pain and dysfunction will definitely occur, and appropriate manipulation and repositioning, massage, traction and other treatments are needed, and one-sided braking and resting may not have the desired effect. If the sprain is very serious, it will cause cervical intervertebral subluxation, such as atlantoaxial subluxation, in which case the pain and dysfunction are more obvious, and in serious cases, the dysfunction of the upper limbs or limbs will occur, so this situation must go to the hospital for professional treatment.