Irregular spotting between periods is also known as intermenstural bleeding.
There can be a variety of reasons behind the occurrence of intermenstural bleeding.
Some of the common reasons may include early pregnancy, vaginal infections or STDs or even cervical or endometrial polyps.
If you are experiencing such symptoms, it would be important for you to see your doctor to undergo further investigations to find out the underlying reason behind it.
Hope this helps.
Regards,
Dr Michelle Chia