Pelvic pain on the right side may be caused by endometriosis, but also may be caused by many things including appendicitis, mittelschmerz, ovarian cysts or urinary tract infections, according to WebMD. Other reasons for right side pelvic pain include kidney stones and a sexually transmitted disease.
Endometriosis can occur almost anywhere in the body and pain occurs in these areas during the menstrual cycle, claims WebMD. Appendicitis also may cause pain on the right side of the pelvis, and this is a serious condition that needs immediate medical attention. Mittelschmerz, or painful ovulation, may also cause pain on the right side of the pelvis and occurs midway through ovulation.
Another reason right side pelvic pain may occur is due to ovarian cysts, explains WebMD. They are usually harmless and go away on their own, but large cysts may need to be surgically removed. Urinary tract infections may also cause pain in the pelvis and may spread to the kidneys if not treated quickly. Kidney stones are also known to cause extreme pain in the pelvis and are often accompanied by pink or red urine. Also, there are some sexually transmitted diseases that may cause pain in the pelvis such as gonorrhea and chlamydia. A doctor should be seen if sexually transmitted diseases are suspected.