Menstrual Phase: Understanding Your Period

Days 1–5 (average)Your body's Winter

Everything you need to know about the menstrual phase — what happens in your body, how hormones shift, the best foods and exercises, and when to be concerned.

Revisado medicamente por

Dr. Sarah Chen, MD, FACOGObstetrics & Gynecology, Stanford Medicine

Última revisão médica: July 10, 2024

Mudanças hormonais

ProstaglandinsLow estrogenLow progesterone

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.

Níveis hormonais durante esta fase

Estrogen
Low
Progesterone
Low
Testosterone
Low

Sintomas

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.

Menstrual cramps (dysmenorrhea)
Fatigue and low energy
Bloating and water retention
Headaches or migraines
Mood changes and irritability
Lower back pain
Breast tenderness (subsiding)
Digestive changes

O que esperar

Guia de nutrição

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 — warm herbal teas (chamomile, ginger) can soothe cramps. Limit caffeine and salt, which worsen bloating.

Recomendações de exercício

Light exercise like walking, restorative yoga, or gentle stretching can help relieve cramps by increasing blood flow and releasing endorphins. Swimming is also excellent — warm water eases muscle tension. Listen to your body — rest if you need to. Avoid intense HIIT or heavy lifting on the heaviest days.

Cuidados com a pele

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 — stick to your simplest routine.

Humor e energia

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' — honor the need for quiet and rest.

Dicas de autocuidado

Use a heating pad or warm water bottle for cramps — 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 — this phase is about recovery and renewal.

Perguntas frequentes

How long does the menstrual phase last?
The menstrual phase typically lasts 3-7 days, with an average of about 5 days. Duration varies between individuals and cycles. Consistently shorter or longer periods should be discussed with a healthcare provider.
Is it safe to exercise during your period?
Yes, exercise during your period is completely safe and often beneficial. Studies show that moderate exercise reduces menstrual cramps by releasing endorphins. Light walking, yoga, and swimming are particularly helpful.
What foods help with period cramps?
Iron-rich foods (spinach, lentils), anti-inflammatory foods (ginger, turmeric, fatty fish with omega-3s), and magnesium-rich foods (dark chocolate, nuts) can help reduce cramps. Staying hydrated and limiting caffeine also helps.
When should I see a doctor about my period?
See a doctor if you soak through a pad/tampon every hour, your period lasts more than 7 days, you experience severe pain that interferes with daily life, or you notice unusual changes in your cycle pattern.

Descubra em qual fase você está com Cyra AI

Nossa AI aprende os padrões do SEU ciclo — não médias de livro didático. Saiba exatamente quando cada fase começa e termina.

Fontes e referências

All health claims on this page are supported by peer-reviewed research, clinical guidelines, or authoritative medical sources.

  1. 1

    Reed BG, Carr BR. The Normal Menstrual Cycle and the Control of Ovulation. Endotext. 2018.

    View source
  2. 2

    Proctor M, Farquhar C. Diagnosis and management of dysmenorrhoea. BMJ. 2006;332(7550):1134-1138.

    DOI: 10.1136/bmj.332.7550.1134
  3. 3

    Akin MD, et al. Continuous low-level topical heat in the treatment of dysmenorrhea. Obstet Gynecol. 2001;97(3):343-349.

    PubMed