Withdrawal bleeding is usually not very heavy. Most withdrawal bleeding does not exceed the amount of menstrual blood and lasts for about 7 days. However, the exact amount and duration of bleeding varies from person to person. Withdrawal bleeding is a condition in which a woman takes oral contraceptives or some estrogen and progestin combination drugs, and the hormone levels in her body fluctuate due to the stimulation of the drugs, resulting in partial shedding of the endometrium under the influence of hormones and bleeding. If the endometrium is thin, the amount of bleeding from withdrawal bleeding will be less. However, when a woman has a thick endometrium, the amount of withdrawal bleeding will be more and may be accompanied by clots, with the volume of blood being approximately the same or slightly more than the volume of her period. It usually does not affect the body much and the symptoms will disappear on their own with time, so no special treatment is needed. However, if a woman has a large amount of bleeding, she needs to go to the hospital immediately and can follow medical advice to stop the bleeding in order to avoid blood loss anemia, which is harmful to her health. In addition, when taking short-acting contraceptive pills, you should take them according to time to avoid missing them, while emergency contraceptive pills should not be taken more than 2 times in a month and not more than 3 times in a year, as overdose can inhibit ovulation of the ovaries, leading to irregular menstruation and serious infertility.