what is pms?
premenstrual syndrome, usually shortened to pms, is the name given to the mix of physical and emotional changes that many people notice in the days before their period starts. it's incredibly common. most people who have periods experience at least some symptoms at some point in their life, even if they're mild and easy to live with.
pms symptoms tend to show up in the second half of the menstrual cycle, in what's known as the luteal phase, and usually ease off once bleeding begins. the pattern is the clue: if the same symptoms come back month after month around the same point in your cycle, that's generally what's being described when someone talks about pms.
why does it happen?
the exact cause isn't fully understood, but it's thought to be linked to the natural rise and fall of hormones like oestrogen and progesterone after ovulation, and how these shifts interact with brain chemicals that affect mood, such as serotonin. not everyone responds to these changes in the same way, which is part of why pms can look so different from person to person.
what does pms actually feel like?
pms isn't one single experience. some people mainly notice physical symptoms, others mostly emotional ones, and many notice a combination. common examples include:
- bloating and breast tenderness
- headaches or fatigue
- irritability, low mood or anxiety
- food cravings and changes in appetite
- trouble sleeping or concentrating
symptoms can range from barely noticeable to genuinely disruptive, and severity can also change from cycle to cycle depending on stress, sleep, and other lifestyle factors.
is pms the same for everyone?
no. some people have very mild symptoms they barely register, while others find pms interferes with work, relationships or daily life. a smaller number of people experience a much more severe form of premenstrual symptoms known as pmdd (premenstrual dysphoric disorder), which is a diagnosable condition and is different from typical pms. we cover this in more detail elsewhere in this guide.
managing pms day to day
there's no single fix for pms, and it's worth being wary of anything that promises one. instead, many people find that a combination of small, evidence informed habits, such as regular movement, a balanced diet, consistent sleep and stress management, can make symptoms more manageable over time. some people also explore approaches like seed cycling as part of a broader, personalised wellbeing routine, alongside rather than instead of general healthy habits.
if your symptoms are severe, persistent, or getting in the way of daily life, it's a good idea to speak with a doctor or other healthcare professional. they can help rule out other causes and talk through options that are right for you.