Menstrual Phase: Understanding Your Period
Everything you need to know about the menstrual phase β what happens in your body, how hormones shift, the best foods and exercises, and when to be concerned.
Medically reviewed by
Dr. Sarah Chen, MD, FACOG β Obstetrics & Gynecology, Stanford Medicine
Last medical review: July 10, 2024
Hormone changes
Both estrogen and progesterone are at their lowest levels. The uterine lining sheds, which is your period. Prostaglandins trigger uterine contractions that cause cramps. Iron is lost through menstrual blood.
Hormone levels during this phase
Symptoms
Bleeding (light to heavy), possible cramps, fatigue, lower energy levels. Some women experience headaches, mood changes, and digestive discomfort. The first 1-2 days are typically the heaviest.
What to expect
Nutrition guide
Focus on iron-rich foods (spinach, lentils, red meat, dark chocolate) to replace lost iron. Anti-inflammatory foods like ginger, turmeric, and fatty fish may help with cramps. Omega-3 fatty acids reduce prostaglandin production. Stay well hydrated β warm herbal teas (chamomile, ginger) can soothe cramps. Limit caffeine and salt, which worsen bloating.
Exercise recommendations
Light exercise like walking, restorative yoga, or gentle stretching can help relieve cramps by increasing blood flow and releasing endorphins. Swimming is also excellent β warm water eases muscle tension. Listen to your body β rest if you need to. Avoid intense HIIT or heavy lifting on the heaviest days.
Skincare
Skin is at its driest and most sensitive during menstruation due to low estrogen. Use gentle, hydrating products. Avoid harsh exfoliants or active ingredients like retinol. Focus on moisture-barrier repair with ceramides and hyaluronic acid. Redness and sensitivity are normal β stick to your simplest routine.
Mood & energy
You may feel more introspective, reflective, or low-energy at the start. Some women experience sadness or irritability. Mood gradually improves as hormones begin rising again. This is your body's natural 'winter' β honor the need for quiet and rest.
Self-care tips
Use a heating pad or warm water bottle for cramps β heat relaxes the uterine muscle and is as effective as ibuprofen in studies. Prioritize rest and sleep. Practice gentle breathing exercises. Journaling and meditation can help process emotions. Be compassionate with yourself β this phase is about recovery and renewal.
Frequently asked questions
How long does the menstrual phase last?βΌ
Is it safe to exercise during your period?βΌ
What foods help with period cramps?βΌ
When should I see a doctor about my period?βΌ
Track which phase you're in with Cyra AI
Our AI learns YOUR unique cycle patterns β not textbook averages. Know exactly when each phase starts and ends.
Editorial Policy
Cyra provides health information for educational purposes only. This information is not intended as medical advice and should not replace consultation with qualified healthcare professionals. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.
Sources & references
All health claims on this page are supported by peer-reviewed research, clinical guidelines, or authoritative medical sources.
- 1
Reed BG, Carr BR. The Normal Menstrual Cycle and the Control of Ovulation. Endotext. 2018.
View source - 2
Proctor M, Farquhar C. Diagnosis and management of dysmenorrhoea. BMJ. 2006;332(7550):1134-1138.
DOI: 10.1136/bmj.332.7550.1134 - 3
Akin MD, et al. Continuous low-level topical heat in the treatment of dysmenorrhea. Obstet Gynecol. 2001;97(3):343-349.
PubMed