Premenstrual syndrome during your period: what to know

PMS is a cycle-related group of physical and emotional symptoms that appears after ovulation and before menstruation. Bloating, breast tenderness, fatigue, appetite changes, irritability, and headaches may linger as bleeding begins. Cramps during bleeding are often related to uterine contractions rather than PMS alone, so timing matters. A symptom diary can show whether your symptoms start before bleeding, continue into it, or occur throughout the cycle. A change from your usual pattern should not be labelled PMS without an assessment.

Plan rest, regular food, fluids, gentle activity, and heat around the days when symptoms tend to appear. Use a calendar or phone note to record the first day of bleeding, pain, mood changes, sleep, and medicines. A pharmacist can help you choose suitable pain relief and check for interactions or reasons to avoid it. If symptoms repeatedly disrupt daily life, a clinician may discuss hormonal options such as the Combined Pill, alongside non-hormonal approaches.

Seek medical advice when pain is severe, lasts well beyond the start of bleeding, steadily worsens, or prevents normal activities. Also arrange care for bleeding between periods, bleeding after sex, very heavy or prolonged bleeding, fever, unusual discharge, pain during sex, or new bowel or bladder symptoms. Get urgent help for sudden intense pain, fainting, or pregnancy-related pain or bleeding.

Do my symptoms fit PMS, period pain, or another condition? What timing should I record? Which treatments could help both premenstrual symptoms and bleeding-related pain?