Period blood is not one color
Most people grow up assuming period blood is just red. In reality, it shows up in a small rainbow: bright red, dark red, brown, almost black, pink, sometimes orange. Color is mostly about how long the blood spent inside the uterus before leaving.
Fresh blood is brighter. Older blood is darker, often brown. Both are usually normal across the same period.
Common colors decoded
Bright red is fresh and usually means active flow, often the middle days of a period. Dark red can mean blood that pooled overnight or sat in the uterus for a few hours.
Brown or near-black is older oxidized blood, common at the very start of a period (slow-moving lining from the previous month) or at the very end. Pink can be lighter flow or blood mixed with cervical mucus or discharge. Orange or grey blood, especially with odor, can suggest infection and is worth a clinician.
Clots: when normal, when not
Small clots, smaller than a grape, are common on heavier days. The body produces anticoagulants to keep period blood liquid, but on heavy days it can shed faster than those can keep up. That is when small clots appear.
Clots regularly larger than a grape, or many large clots in a row, can point to heavier-than-typical bleeding and deserve a clinician check, especially if paired with iron deficiency or fatigue.
How heavy is too heavy
A common rule of thumb: if you are soaking through a regular pad or tampon every hour for several hours in a row, that is heavy enough to deserve evaluation. Bleeding that lasts more than seven days, that requires waking up at night to change products, or that limits normal life is also worth investigating.
Heavy periods are common and treatable. Causes include fibroids, adenomyosis, polyps, hormonal imbalance, bleeding disorders, and IUD adjustment. None of those are personal failings, and most have real treatment paths.
When to call a clinician
Most periods are uncomplicated. A few patterns deserve attention rather than another month of guessing.
Reasons to contact a clinician:
- Soaking through a pad or tampon every hour for several hours.
- Bleeding longer than 7 to 10 days regularly.
- Periods that have suddenly become much heavier than your baseline.
- Severe cramping that disrupts daily life.
- Foul odor, fever, or feeling faint during a period.
Color is just one signal
Color is interesting, not diagnostic. It is one signal alongside flow, length, pain, mood, and overall pattern. Tracking color and flow for a few cycles in Flowra turns vague memory into something a clinician can actually use.