Home Women's HealthAlterations in menstruation Causes of dark and thick rule

Causes of dark and thick rule

by Alivia Nyhan
Published: Last Updated on

The female menstrual cycle begins with the rule’s arrival, which is nothing more than the detachment of the endometrium, the layer that covers the uterus. The female body’s blood discharges through the vagina is also made up of cells, vaginal discharge, and enzymes. The color and texture of this fluid can vary according to the stage of the woman’s life, her hormonal condition, health problems, and the regularity of the menstrual cycle.

In most women, the period is a red, liquid fluid expelled for 4 to 5 days. However, some women may have sudden changes in the color and texture, which they take as a sign of alarm and trigger concern. Fortunately, these changes are not associated with the disease in most cases. There are several colors that the period can have, and that is considered normal. We invite you to continue reading this FastlyHealarticle where we answer the question: why is my period thick and thin? So that you can calm your doubts and learn more about what the color of your period means.

Dark and thick ruler: causes

The first thing you should know is that any change in your body, hormonal, physiological, or emotional, can interfere with your menstrual cycle by altering its course, delaying the arrival of your period, and changing the color and texture of the fluid. Likewise, it is essential to note that the rule is different for all women. Some women last longer days, others have abdominal pain, and girls with irregular cycles never know when their period will arrive. Therefore, most of the time, changes related to the color and texture of the ruler are entirely regular.

Why is the ruler dark and thick?

When the period varies from a red color and liquid texture to a very dark brown, almost black, and a much thicker consistency, it is usually because the blood has been in the uterus for a long time and has not been eliminated quickly. This blood can be old blood left on the uterus walls and that you are expelling now, which is a prevalent sign in women with irregular periods, whose period has not decreased for two and three months.

The good news is that, in any case, the dark and thick rule is something normal that does not pose any risk to your health or the well-being of your reproductive system. It is also essential that you know that there are many women whose period is red during the first days and at the end of the period it turns dark brown, this is also normal since that blood represents the remains of the endometrium that may remain in the uterus, so Therefore, it is ancient blood that has changed color over time.

Colors of menstruation and their meaning

Learning to know your body and your menstrual cycle is very important to keep track of your period and possibly hormonal changes. However, knowing what any change in the color and texture of your menstruation means is also important know what is happening to your body and when you should see a doctor. For this reason, we inform you below of the different colors that your rule can adopt and their meaning:

Bright red

This is very new blood recently shed and released from your body. The rules of this color are usually of light consistency and are the most common among females.

Dark red

It is much older blood than the previous one stored in the uterus for a longer time and was not shed immediately. This color of the rule is most common first thing in the morning when we wake up from the rest of eight hours or more.


It can cause as much nervousness as a dark and thick rule, but it is also a normal fluid. Menstruation turns orange or orange with red stripes when blood has mixed with fluids from the cervix. However, when the blood is orange and bright, it is a sign of an infection, and it is recommended that you visit your gynecologist.

Rule Consistencies and Their Meanings

Just as the color of your period can tell you what’s going on with your menstrual cycle, consistency is also a meaningful sign. Generally, the screed should be light to thick and free of stickiness, considered normal and healthy. However, some women have other types of menstruation, such as those detailed below.


The blood is slippery like jelly and is usually a result of the period mixing with concentrated cervical mucus in the vagina, resulting in that gel-like appearance.

Blood clots

When the periods are abundant, the body produces anticoagulants to prevent clotting. Still, since the rule is long, the body does not have enough time to exert the anticoagulant action before so much volume, which causes menstruation with blood clots. Clots are usually dark-colored blood, as they are old blood that has collected in the uterus. When clots accompany the periods, it is essential to carry out a medical check-up to rule out complications such as fibroids in the uterus or hormonal irregularities.

Fine ruler

Its consistency is often due to moderate or poor blood flow. It is red and may be mixed with fluid from the cervix.

Ruler with tissues

You have to be very attentive to this type of consistency since when the rule is accompanied by endometrial tissue, it is considered an abortion alert.

This article is merely informative. At FastlyHeal .com, we do not have the power to prescribe medical treatments or make any diagnosis. We invite you to see a doctor if you present any condition or discomfort.

If you want to read more articles similar to Why my period is dark and thick, we recommend that you enter our category of the Female reproductive system.

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