Appendicitis is a relatively common acute abdominal disease among clinical surgery, patients with appendicitis who do not have pain, including the following reasons. It is possible that early simple appendicitis, due to their own body immune ability is relatively strong or physical fitness, there may be self-healing, pain gradually reduced, or even completely self-healing possibility. It is also possible that the diagnosis of appendicitis is not very clear, sometimes the appendix area with the surrounding cecum, ileum lymph node inflammation can also appear appendicitis pain, when the inflammation is under control after the pain may gradually reduce, or even symptoms disappear. Even if the appendicitis does not feel pain, it is necessary to go to the regular hospital for a detailed examination, if necessary, can be further diagnosed by doing blood routine and abdominal ultrasound of the appendiceal area, so as not to delay the condition.