Why would you think that is cervical cancer?
Having one labia larger than the other is EXTREMELY normal. We aren't symmetrical, especially not our genitalia. ALL labia are different, including our own.
Hi!
Well one labia is larger than the other but not disproportionately so. The larger labia with discoloration can be due to injury (may not be aware of a fall or a hit) or rough sex, or STD or a blood clot.
It is difficult to diagnose this on net. Please consult your doctor. Take care!