The first method is to find the laryngeal node, which is the location of the thyroid cartilage plate, below which is the cricoid cartilage, which is an annular bone structure with an anterior arch and a posterior plate with a protrusion in front. The second way, the cricoid cartilage is directly opposite the location of the 6th cervical vertebra. If the patient finds the 6th cervical vertebra, the location corresponding to the 6th cervical vertebra forward is the cricoid cartilage, clinically through the 7th cervical vertebra in the back of the neck, the 7th cervical vertebra is a very obvious protrusion, and above this is the 6th cervical vertebra. The third method is that the trachea is below the cricoid cartilage. If the cervical trachea can be felt first, a protrusion of the trachea can be found upward, which is the cricoid cartilage, and there is a cricothyroid membrane between the cricothyroid cartilage and the thyroid cartilage plate, and there is no nerve or blood vessel inside the cricothyroid membrane. If the patient has acute respiratory distress and tracheotomy is not possible, cricothyroid puncture can be done to relieve the patient briefly.