Peace be upon you. According to Grand Ayatollah Khamenei (may Allah protect him): If the discharge is not blood and is not accompanied by any impurities (like urine), it is considered pure and does not carry any specific ruling. However, if you know that this discharge is blood and it does not meet the legal conditions for menstruation (such as seeing blood before menopause), it is not considered menstruation but rather is ruled as istihada (non-menstrual bleeding). Unless you are certain that it is due to inflammation, a wound, or something similar, it should not be classified as menstruation or istihada. If the first blood occurs during her usual menstrual days, it is considered menstruation, and if the second blood has the characteristics of istihada, she should observe the prohibitions of menstruating women and the actions of those experiencing istihada. For more information on menopause, you can refer to question 2621. Source: Official website, questions 33, 34, 35, 9. According to Grand Ayatollah Sistani (may Allah protect him): If the discharge is not blood and is not accompanied by any impurities (like urine), it is considered pure and does not carry any specific ruling. If it is known to be blood and meets the conditions for menstruation (including seeing blood before menopause), it is menstruation; otherwise, it is istihada unless it is due to a wound or inflammation. For more information on menopause, you can refer to question 2621. Source: Official website, question 10461, Selected Issues of Purity » Istihada. May you be successful in all good.