Learn common symptoms of menstruation, understand the four phases of the menstrual cycle, track period changes, and recognise symptoms that may need medical attention.
Dr. Ezhilrasan
Most people who menstruate spend decades living with monthly hormonal shifts, yet the symptoms for menstruation are rarely explained clearly or completely. Understanding what your body is doing at each phase can help you tell normal discomfort apart from a sign that something needs attention.
The menstrual cycle is a recurring hormonal process driven by oestrogen, progesterone, luteinising hormone (LH), and follicle-stimulating hormone (FSH). Each cycle begins on the first day of your period and ends the day before your next period starts.
A normal cycle length falls anywhere between 21 and 35 days. Cycles consistently shorter or longer than this range may point to an underlying issue worth discussing with a doctor. A variation of a few days from cycle to cycle is common and usually nothing to worry about.
The menstrual cycle phases are not just calendar divisions. Each phase brings distinct hormonal shifts that directly shape how you feel, physically and emotionally.
| Phase | Approximate Duration | Key Hormones |
| Menstrual | Days 1 to 5 | Oestrogen and progesterone low |
| Follicular | Days 1 to 13 | FSH rises, oestrogen climbs |
| Ovulatory | Around day 14 | LH surges, oestrogen peaks |
| Luteal | Days 15 to 28 | Progesterone dominant |
Symptoms for menstruation fall into two groups: those that arrive before bleeding starts and those that occur during the period itself.
In the luteal phase, falling progesterone and shifting oestrogen commonly cause:
These are classic premenstrual symptoms of PMS. They typically appear 5 to 10 days before bleeding and ease once the period begins. When symptoms are severe enough to disrupt daily life, the condition is called premenstrual dysphoric disorder (PMDD), which requires medical assessment.
Once bleeding starts, the most common period symptoms include:
Mild to moderate cramping with manageable bleeding is considered normal. Pain that stops you from attending school or work, or bleeding that soaks through a pad every hour, warrants a clinical review.
Most signs of menstruation fall within a predictable range. The following patterns deserve prompt medical attention.
Conditions such as endometriosis, polycystic ovary syndrome (PCOS), uterine fibroids, and thyroid disorders often first show up as abnormal cycle symptoms. Early diagnosis significantly improves outcomes for all of these.
If you notice any unexpected symptoms after starting any treatment for period complaints, report adverse events to your healthcare provider or the relevant regulatory authority.
Many people reach for over-the-counter nonsteroidal anti-inflammatory drugs (NSAIDs) to manage cramping. NSAIDs reduce prostaglandin production and are effective for most people when taken at the start of symptoms. However, they are not suitable for everyone.
Who should avoid NSAIDs without medical advice:
Hormonal options, such as combined oral contraceptive pills, are sometimes prescribed for severe dysmenorrhoea or PMDD. These are not appropriate for everyone. People who smoke and are over 35, those with a history of blood clots, migraine with aura, or certain liver conditions should not start hormonal therapy without a thorough medical assessment.
Heat therapy applied to the lower abdomen is a safe first option for most people and carries no significant contraindications for otherwise healthy individuals. If you are unsure which option is right for you, consult a gynaecologist before starting any medication.
Knowing how to track your menstrual cycle accurately gives you useful data for spotting patterns, identifying irregular periods symptoms early, and having more informed conversations with your doctor.
The key with any method is consistency. Three cycles of data is a minimum baseline; six or more cycles gives a much clearer picture of what is normal for you and makes it easier to spot genuine irregularities.
Understanding the symptoms of menstruation and the four phases of the menstrual cycle can help you recognise what is normal for your body and identify changes that may need medical attention. Mild cramps, bloating, breast tenderness, mood changes, and fatigue are common, but severe pain, very heavy bleeding, persistent irregular cycles, or bleeding between periods should not be ignored. Tracking your periods, symptoms, bleeding patterns, and cycle length can help identify recurring changes and provide useful information during a medical consultation.
The earliest signs of menstruation typically appear 5 to 10 days before bleeding, during the luteal phase. These include bloating, breast tenderness, mood changes, and fatigue, all of which are common premenstrual symptoms driven by shifting progesterone levels.
Most people bleed for 3 to 7 days per cycle, though this varies. Bleeding consistently lasting fewer than 3 days or more than 7 days can be one of the irregular periods symptoms worth discussing with a doctor.
Yes, mood swings are a recognised premenstrual symptom linked to the hormonal fluctuations of the luteal phase. If they are severe enough to affect relationships or daily functioning, speak to a doctor about PMDD.
Stress can disrupt the hormonal signals that regulate your cycle, which may delay ovulation and push back your period. Persistent stress-related cycle changes are among the more common irregular periods symptoms seen in clinical practice.
Foods rich in magnesium, such as leafy greens and nuts, and omega-3 fatty acids, found in oily fish and flaxseed, may help reduce cramping and bloating for some people. Limiting excess salt, caffeine, and alcohol in the week before your period can also ease fluid retention.
