What is the cause of the right lower paroxysmal pain in the abdomen, the right lower paroxysmal pain in the abdomen first consider appendicitis and urinary tract lesions: 1, if acute appendicitis, it has the characteristics of metastatic right lower abdominal pain, the pain can be in the right lower abdomen in the umbilicus and anterior superior iliac spine connecting line, the connecting line in the middle and outer 1/3 of the place of compression pain, rebound pain and even muscle tension, and accompanied by nausea, vomiting, fever; 2, urinary tract stones can also occur Paroxysmal colic, the pain is very intense, can appear renal colic, pain in the waist can be radiated to the groin, external genitalia and inner thighs, can be accompanied by frequent urination, urinary urgency. Urine examination of urine can find red blood cells, and even protein. 3, in addition to these, we should also pay attention to some male and female reproductive gynecological diseases, such as female endometriosis, adnexitis and so on.