Hello
.Assuming a woman is not just missing her pills every couple of days, the most common cause of continuous bleeding is due to low estrogens which make the endometrium atrophic . A small amount of estrogen is needed to make the lining of the uterus repair the open blood vessels that result from a menstrual slough. After a menses, estrogen alone in a normally ovulating woman not taking birth control starts the tissue growing again and in effect seals off the bleeding blood vessels. This makes bleeding stop. With birth control pills that have both estrogen (very small doses) and progestin in each pill, the progestin component works opposite the the estrogen and does not allow the endometrial tissue to grow and repair itself.
If you have this continuous spotting on the pills, the estrogen level needs to be raised.
You can discuss with your gynaecologist to consider shifting on a high oestrogen pill or stop this pill.
Check this link
http://www.wdxcyber.com/ncontr12.htm
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