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Health7 min readJan 15, 2026

Period Health 101: What Your Cycle Is Telling You

Your period is sometimes called your "fifth vital sign" — and for good reason. Changes in your menstrual cycle can signal important things about your overall health.

What's "Normal" Anyway?

First, let's ditch the idea of a perfect 28-day cycle. That's a textbook average, not a rule. Normal cycles range from 21 to 35 days, and your period can last anywhere from 2 to 7 days.

What matters more than hitting a specific number is knowing what's normal for you — and noticing when things change.

Period Color Guide

🔴 Bright RedFresh blood, healthy active flow. This is what most of your period looks like at its heaviest.
🟤 Dark BrownOlder blood that took longer to leave your uterus. Totally normal at the start or end of your period.
🩷 Light PinkBlood mixed with cervical fluid. Can indicate low estrogen or light flow days.
🟠 OrangeMay indicate blood mixed with cervical fluid — or, rarely, an infection. Worth mentioning to your doctor if persistent.

When to See a Doctor

Track your cycle for a few months and talk to a healthcare provider if you notice:

  • Periods suddenly becoming much heavier or lighter
  • Cycles shorter than 21 days or longer than 35 days
  • Bleeding between periods
  • Severe pain that disrupts your daily life
  • Periods stopping for 3+ months (if not pregnant)
  • Significant clots larger than a quarter

The Bottom Line

Your period is a window into your health. Pay attention to it, track it, and don't be afraid to talk about it — with friends, family, or your doctor. The more we normalize these conversations, the better care we all get.

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