Hi, If you have mentioned regarding your age, menstrual history and obstetric history, more accurate answer might have been possible. Anyhow, according to the description the possible causes of your pink color discharge are: - Minor fluctuations in the menstrual flow can be seen frequently due to different causes ranging from psychological like stress and strain, hormonal like polycystic ovarian disease, thyroid hormone abnormalities, etc. Due to reproductive hormonal fluctuations during the premenstrual period, sometimes spotting can be seen which will usually convert into regular menstrual flow. - If there are any uses of contraceptive measures intermenstrual spotting can be seen as a side effect. - If there is any possibility of pregnancy, please go for a urine pregnancy test to rule out the possibility. If the spotting persists without converting into the menstrual flow better to get evaluated, please consult your gynecologist once and get evaluated. By clinical examination and investigations like pregnancy test and ultrasound the possible cause of your problem can be identified in treatment can be taken accordingly. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Sree Gouri S. R., OBGYN