My period is not as heavy as usual

Flow can vary from cycle to cycle with stress, illness, changes in weight or exercise, breastfeeding, contraception, or medicines. A lighter bleed may also be early pregnancy bleeding rather than a true period, so consider pregnancy if it is possible. Hormonal changes around perimenopause can make cycles less predictable. Polycystic ovary syndrome may cause infrequent or altered bleeding. Less commonly, changes inside the womb, such as adenomyosis, endometrial polyps, or endometrial hyperplasia, need assessment based on your wider symptoms.

A single lighter cycle without other symptoms is usually less concerning than a repeated change. Note the timing, number of days, colour, pain, and any bleeding between periods.

Record this cycle and compare it with your usual pattern over the next cycles. Take a home pregnancy test if pregnancy is possible, following the test instructions and repeating it if advised when the result is negative but your period remains unusual. Arrange a routine appointment if the lighter flow keeps happening, periods become widely spaced, or you develop pelvic pain, unusual discharge, new facial hair, or troublesome acne. A clinician may ask about contraception, medicines, pregnancy possibility, and recent health changes.

Seek urgent medical help for severe or one-sided pelvic pain, fainting, marked dizziness, shoulder-tip pain, or bleeding during a possible pregnancy. These symptoms can require prompt assessment. Contact a clinician soon if you have fever, worsening pain, or bleeding between periods or after sex.

Ask whether pregnancy testing or an examination is appropriate, whether your contraception or medicines could affect flow, and which symptoms would justify blood tests or an ultrasound. Ask how to track your cycle and when a repeated change should be reviewed.