What is Premenstrual Syndrome: Causes and Symptoms

For many women, the days leading up to a period feel like a total body takeover. Sudden bouts of crying, painful bloating, and a sharp drop in energy aren’t just moodiness; they are part of a complex biological event known as Premenstrual Syndrome (PMS).

While nearly 90% of females experience some form of premenstrual syndrome symptoms, the intensity varies. For some, it is a minor inconvenience; for others, the worst PMS symptoms can be so debilitating that they disrupt daily life, work, and relationships.

Understanding the why behind these shifts is the first step in regaining control over your monthly health.

What is Premenstrual Syndrome? (And Is PMS Normal?)

PMS Premenstrual Syndrome is a combination of physical and emotional changes that occur after ovulation and before the start of menstrual bleeding.

Is PMS normal? 

Biologically, yes. It is a sign that your body is moving through the luteal phase of your menstrual cycle. However, while having PMS symptoms is common, suffering through extreme pain or mental distress is not something you have to accept. 

If your symptoms stop you from functioning, it is always better to consult a gynaecologist. It’ll help you know exactly what to do next to find relief.

What Causes PMS?

PMS isn't caused by a single "bad" hormone, but rather the fluctuation of several chemicals.

1. The Progesterone Drop: After ovulation, progesterone levels rise to prepare the uterus for a potential pregnancy. If pregnancy doesn't occur, these levels, along with estrogen, plummet suddenly. This sharp withdrawal triggers the physical and emotional distress we call PMS.

2. The Serotonin Connection: The drop in estrogen directly impacts serotonin, a neurotransmitter in the brain that regulates mood, sleep, and appetite. When serotonin dips 1 week before period symptoms start, it leads to the classic PMS emotional symptoms like irritability, sadness, and intense food cravings.

3. Aldosterone and Bloating: Hormonal shifts also affect aldosterone, a hormone that regulates salt and water balance. This is why you feel heavy or bloated right before your flow begins.

What are the Common Premenstrual Syndrome Symptoms?

PMS does not look the same for everyone. Your best friend might get bad cramps, while you might just feel extra sleepy. The signs usually fall into two buckets: physical and emotional.

1. Physical Symptoms

• Breast Tenderness: Fluctuating hormones cause the milk ducts and glands to enlarge, leading to heavy, sore breasts.

• Digestive Shifts: Bloating, gas, and even "period flu" symptoms (nausea or muscle aches).

• Skin Flare-ups: Rising progesterone increases sebum production, leading to pre-period acne.

• Sleep Disturbances: Lowered serotonin and increased body temperature can make it harder to fall or stay asleep.

2. PMS Emotional Symptoms

• Mood Swings: Rapid shifts from feeling okay to feeling intensely angry or sad.

• Brain Fog: Difficulty focusing or a general feeling of mental fatigue.

• Social Withdrawal: A sudden desire to avoid social interaction or feeling easily overwhelmed by small tasks.

Note: These PMS symptoms typically appear 5 to 11 days before your period and generally subside within a day or two after your bleeding starts. If your symptoms last much longer or feel too overwhelming to manage, talk to a gynaecologist to understand exactly what your body is going through and how it can be treated.

PMS vs. PMDD: When Do Symptoms Become Severe?

There is a significant difference between PMS and PMDD (Premenstrual Dysphoric Disorder).

While PMS is manageable, PMDD is a severe, clinical condition affecting about 5% to 8% of women. It is characterised by extreme "black cloud" depression, panic attacks, or thoughts of hopelessness. 

If your 1 week before period symptoms feel like a mental health crisis every single month, it is likely PMDD and requires specialised medical intervention.

PMS vs Pregnancy Symptoms: How to Differentiate Between Them?

Because both PMS and early pregnancy share the same hormones, the signs can feel identical. If you are sexually active, telling the difference between PMS and pregnancy symptoms can be very stressful.

Here is a simple breakdown to help you spot the difference:

Conclusion

Recognising Premenstrual Syndrome symptoms is about more than just predicting your period. It is about understanding the chemical shifts your body performs every month.

While a certain level of discomfort happens, you shouldn't have to put your life on hold. Identifying whether you are experiencing standard PMS or the more intense symptoms of PMDD is the first step toward better cycle health.

If your symptoms feel overwhelming or if you're struggling to tell the difference between a normal cycle and a hormonal imbalance, don't stress out alone. You can chat with a gynaecologist online to discuss your specific symptoms and get the clarity you need to feel like yourself again, all month long.

Frequently Asked Questions (FAQs)

1. Does PMS go away when the period starts?

Yes. As your period begins, hormone levels start rising again. This shift usually makes physical and emotional PMS symptoms disappear completely within a few days.

2. Why does PMS stop when periods start?

It stops because estrogen and progesterone levels stop dropping and begin to stabilise. This hormonal reset signals your body to ease the physical and emotional distress.

3. What should I eat during PMS?

Focus on calcium-rich foods, complex carbs like oats, and magnesium-rich greens. Reduce salt, caffeine, and sugar to help minimise bloating, breast tenderness, and mood swings.

4. Is PMS a serious problem?

For most, it is a normal, manageable monthly phase. However, if symptoms are severe enough to disrupt your daily work or relationships, they require professional medical attention.

5. How long does PMS usually last?

PMS typically begins 5 to 11 days before your period. It usually stops within 24 to 48 hours after your menstrual bleeding actually starts.

6. Can high stress make PMS worse?

Absolutely. High stress levels increase cortisol, which can worsen hormonal imbalances. This often leads to more intense mood swings, anxiety, and physical pain during PMS.