What are the hazards of long-term use of birth control pills?

Patient's question:

What should I do if I get pregnant? The harm is relatively small. What are the hazards of taking birth control pills for a long time?

Doctor's answer:

Side Effects of Long-Term Contraceptive Pills
1. Yellow-brown spots on the face: These usually disappear gradually after stopping the medication. Taking vitamin B and vitamin C supplements can enhance the effect.
2. Increased and thin vaginal discharge: This often occurs after taking long-acting contraceptive pills. Generally, no treatment is needed. If the discharge is excessive, one tablet of traditional Chinese medicine for stopping discharge can be placed in the vagina each night.
3. Rapid weight gain: If swelling occurs, diuretics and a low-sodium diet should be adopted. If weight increases significantly, the medication should be stopped and alternative contraception methods should be used.
4. Intermittent vaginal bleeding: This often happens after missing a dose of the contraceptive pill. Generally, bleeding will stop and the menstrual cycle will return to normal if the medication is continued on schedule. Alternatively, the doctor can adjust the medication or switch to a different contraceptive pill. For example, if bleeding occurs while taking the No. 2 pill, the No. 1 pill can be used instead.
5. Reduced menstrual flow, even amenorrhea: This is one of the common side effects and is usually temporary, with no significant impact on health. If amenorrhea persists for three months, the medication should be temporarily stopped. Once menstruation resumes, the medication can be resumed. If menstruation still does not occur one month after stopping the medication, medical examination and treatment under a doctor's guidance should be sought.