Vague pain in the lower right corner of the belly button often requires consideration of the following diseases: 1. The most common disease is mainly acute or chronic appendicitis, which usually manifests as metastatic right lower abdominal pain or sudden right lower abdominal pain. Usually there is fixed pressure pain in the right lower abdomen during physical examination, and further blood tests and ultrasound examination of the appendix are usually needed to clarify the diagnosis; if necessary, surgery is needed. 2. mainly right ureteral lower stones, which can cause vague pain in the right lower abdomen or the right lower corner of the belly button, and further ultrasound examination of the right urinary tract is usually needed to clarify the diagnosis. Smaller stones can be drained by medication, while for larger stones, surgical stone extraction or lithotripsy is required.3. For female patients with pain, further ultrasound examination of the adnexa is also required to rule out the possibility of ovarian cyst tip torsion and corpus luteum rupture, and even surgical treatment is required if necessary.