Updated on 22 December 2023
Medically Reviewed by
Dr. Shruti Tanwar
C-section & gynae problems - MBBS| MS (OBS & Gynae)
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Periods are a natural part of a woman's life, but they can sometimes bring unexpected surprises. One such surprise is the appearance of black period blood, which can be quite unsettling. However, before you panic, it's essential to understand that black colour blood in periods is more common than you might think.
In this article, we will delve deeper into the topic to determine whether black colour period blood is normal or a cause for concern.
Many women may experience variations in the colour and consistency of their menstrual blood, including black blood. While it can be concerning to see black bleeding during periods, it is often a normal occurrence.
Menstrual blood can range in colour from bright red to dark brown, and occasionally even black. The colour of your period blood can be influenced by a variety of factors, such as the age of the blood, the rate of flow, and the presence of certain substances.
You may also like: Understanding Which Hormones Regulate Menstrual Cycle
Polycystic ovary syndrome (PCOS) is a hormonal disorder that affects many women of reproductive age. One of the symptoms of PCOS is irregular periods, which can include changes in the colour and consistency of menstrual blood. While black bleeding in periods can be a symptom of PCOS, it is not exclusive to this condition.
PCOS can cause hormonal imbalances, which can lead to changes in the uterine lining and the way the body sheds it during menstruation. This can result in variations in the colour and texture of menstrual blood, including black blood.
If you too are wondering why is my period blood black and thick, then here are some possible reasons for it:
The presence of older blood in the uterus can cause black bleeding during periods. This is a normal occurrence and usually not a cause for concern.
Blood clots during menstruation can darken the colour of the blood. Small clots are generally normal, but if you are passing large or painful clots, it is recommended to seek medical advice.
If a foreign object, such as a tampon, contraceptive device or sex toy is left in the vaginal canal for a prolonged period, it can lead to black discharge.
Certain infections, such as pelvic inflammatory disease (PID), bacterial vaginosis or a sexually transmitted infection, can cause changes in the colour and odor of menstrual blood. If you suspect an infection, it is important to seek medical attention.
Endometriosis is a condition in which the tissue that lines the uterus grows outside of it. This can cause changes in the colour and consistency of menstrual blood, including black blood.
Uterine fibroids are noncancerous growths that can develop in the uterus. They can cause heavy or prolonged periods, which may include black blood.
Hormonal imbalances, such as those seen in PCOS, can affect the uterine lining and the shedding of blood during menstruation, leading to changes in colour.
Certain medications and contraceptives can affect the colour and consistency of menstrual blood. If you notice any changes after starting a new medication or contraceptive, it is advisable to consult with a healthcare professional.
In rare cases, black vaginal discharge may be a sign of cervical, uterine, or vaginal cancer.
Here are some ways to manage black blood during period and prevent it:
Eating a balanced diet, exercising regularly, and managing stress can help regulate hormonal imbalances and promote a healthy menstrual cycle.
Drinking an adequate amount of water can help thin the blood and reduce the likelihood of blood clots.
Applying heat to the lower abdomen can help alleviate menstrual cramps and improve blood flow, which may help reduce the appearance of black period blood.
If hormonal imbalances are contributing to black colour period blood, hormonal therapy prescribed by a healthcare professional may help regulate the menstrual cycle.
While black bleeding in periods is often normal, there are instances when it is advisable to consult with a healthcare professional:
If you are experiencing severe pain or discomfort during your period
If you are passing large or painful blood clots
If you notice a sudden change in the colour or consistency of your menstrual blood
If you have other symptoms, such as abnormal vaginal discharge or fever
A healthcare professional can evaluate your symptoms, perform any necessary tests, and provide you with appropriate guidance and treatment.
Black and thick period blood is often the result of older blood that has taken longer to leave the uterus. It is usually not a cause for concern and can be considered normal.
Black blood on the first day of your period can be attributed to the presence of older blood that has been in the uterus for a longer period of time. It is generally not a cause for concern.
Women with PCOS may experience black colour bleeding during periods due to hormonal imbalances that interfere with the normal processes of menstruation. It usually indicates presence of old blood that has been in the uterus for a longer time than usual.
While black period blood can be alarming, it is often a normal occurrence and not a cause for concern. It can be the result of older blood or the presence of clots, both of which are generally considered normal during menstruation. However, if you are experiencing severe pain, passing large or painful clots, or noticing other abnormal symptoms, it is important to consult with a healthcare professional for a proper evaluation and appropriate management. Remember to prioritize your health and seek medical advice whenever necessary.
1. Dasharathy SS, Mumford SL, Pollack AZ, Perkins NJ, Mattison DR, Wactawski-Wende J, Schisterman EF. (2012). Menstrual bleeding patterns among regularly menstruating women. Am J Epidemiol.
2. Santos IS, Minten GC, Valle NC, Tuerlinckx GC, Silva AB, Pereira GA, Carriconde JF. (2011). Menstrual bleeding patterns: A community-based cross-sectional study among women aged 18-45 years in Southern Brazil. BMC Womens Health.
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Medically Reviewed by
Dr. Shruti Tanwar
C-section & gynae problems - MBBS| MS (OBS & Gynae)
View Profile
Written by
Anupama Chadha
Anupama Chadha, born and raised in Delhi is a content writer who has written extensively for industries such as HR, Healthcare, Finance, Retail and Tech.
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