Your period problems are not normal
Period problems are common, but that does not make them normal to ignore. Heavy bleeding, severe pain, bleeding between periods, pain during sex, irregular or absent periods, pelvic pain, fatigue from anaemia, or symptoms that stop school, work or normal life deserve assessment. The aim is not to medicalise every period; it is to stop treating endometriosis, fibroids, adenomyosis, PCOS, pelvic infection, thyroid problems, pregnancy complications and anaemia as something people simply have to tolerate.
Key facts
- NHS guidance says heavy periods are common, but you should see a GP if heavy bleeding affects your daily life, has become heavier, or comes with severe pain or bleeding between periods.1
- NICE heavy menstrual bleeding guidance recommends considering the impact on quality of life and assessing for causes such as fibroids, adenomyosis and endometrial pathology where symptoms suggest them.2
- Severe period pain, pelvic pain, pain during or after sex, painful bowel movements, fatigue and fertility problems can be symptoms of endometriosis.45
- Irregular or absent periods with acne, excess facial or body hair, scalp hair thinning or weight changes can suggest PCOS.6
- Bleeding after menopause, a positive pregnancy test with pelvic pain, fever with pelvic pain, or very heavy bleeding with dizziness needs prompt medical advice.8910
Common does not mean normal
Many people are taught that periods are meant to be miserable. That message delays diagnosis. A period can be uncomfortable, but it should not routinely leave you unable to stand, fainting, vomiting, missing work or school, flooding through protection, becoming anaemic, or planning life around pain and bleeding.
Normal also depends on your baseline. A cycle that has always been irregular since teenage years is different from a cycle that suddenly changes at 38. Bleeding that has always been heavy is still worth addressing if it causes anaemia or disrupts life. Pain that started after years of manageable periods deserves a different level of attention.
The most useful question is: what has changed, what is the impact, and what condition could explain it? Period symptoms can come from hormones, the uterus, ovaries, cervix, pelvic floor, bowel, bladder, infection, pregnancy, thyroid disease, clotting problems, medicines or contraception.
Age and life stage matter. Early cycles after periods first start can be irregular, and perimenopause can also make cycles change, but those explanations should not be used to dismiss severe pain, flooding, anaemia symptoms, bleeding after sex, or bleeding after menopause. A pattern can be common for a life stage and still need treatment.
Heavy bleeding
Heavy menstrual bleeding is not defined only by the number of pads or tampons. NICE defines it by excessive menstrual blood loss that interferes with a person's physical, social, emotional or material quality of life.2 That is important because people often adapt to heavy bleeding and underestimate how abnormal it is.
Clues include needing double protection, flooding through clothes or bedding, passing large clots, changing protection very frequently, avoiding leaving the house, or feeling exhausted and breathless around periods. Heavy bleeding can cause iron deficiency anaemia. NHS guidance lists tiredness, lack of energy, shortness of breath and noticeable heartbeats among possible symptoms of iron deficiency anaemia.7
Causes can include fibroids, adenomyosis, polyps, endometriosis, contraception, clotting disorders, thyroid disease, miscarriage, pregnancy complications and, less commonly, cancer-related causes. NICE guidance recommends considering investigations such as full blood count for all women with heavy menstrual bleeding, and choosing further assessment based on history and examination.2
Severe pain and endometriosis patterns
Severe period pain is often minimised. NHS period pain guidance says pain can be common, but you should see a GP if usual painkillers do not help, pain affects daily life, periods become more painful, or you also have pain at other times.3 Pain that is escalating, one-sided, associated with fever, or linked with pregnancy needs more urgent thinking.
Endometriosis is a key condition to consider when pain is severe or multi-system. NHS guidance lists symptoms including pain in the lower tummy or back, period pain that stops normal activities, pain during or after sex, pain when peeing or pooing during a period, feeling sick, constipation, diarrhoea, blood in urine or stool during a period, difficulty getting pregnant and heavy periods.4
NICE endometriosis guidance says to suspect endometriosis in people with symptoms such as chronic pelvic pain, period-related pain affecting daily activities, deep pain during or after sex, period-related bowel or urinary symptoms, infertility with related symptoms, or cyclical symptoms.5 A normal ultrasound does not always rule it out.
| Symptom pattern | Possible causes to consider | What to ask about |
|---|---|---|
| Flooding, clots, anaemia symptoms | Fibroids, adenomyosis, polyps, clotting, thyroid, contraception effects | Full blood count, ferritin, pelvic examination or ultrasound if indicated.2 |
| Pain that stops normal life | Endometriosis, adenomyosis, fibroids, pelvic infection, ovarian cysts | Endometriosis assessment and whether referral is needed.5 |
| Irregular or absent periods with acne or excess hair | PCOS or other hormone causes | PCOS assessment, pregnancy test, thyroid and prolactin if relevant.6 |
| Bleeding after sex or between periods | Cervical changes, infection, polyps, contraception, pregnancy, rarely cancer | Cervical screening status, STI testing, pelvic examination and referral criteria. |
| Pelvic pain with fever or unusual discharge | Pelvic inflammatory disease or infection | Prompt assessment and sexual health testing.9 |
| Positive pregnancy test with pain or bleeding | Miscarriage or ectopic pregnancy risk | Urgent assessment if pain, bleeding, shoulder-tip pain, dizziness or collapse.8 |
Irregular, absent or unpredictable periods
Irregular periods can happen for many reasons: puberty, perimenopause, pregnancy, breastfeeding, contraception, PCOS, thyroid disease, high stress, under-fuelling, weight change, intense training, prolactin problems or some medicines. The pattern matters. A cycle that varies by a few days is different from months without bleeding or bleeding every 2 weeks.
PCOS is common and often under-recognised. NHS guidance lists irregular periods, excess androgen symptoms such as excess facial or body hair, acne and scalp hair thinning, and polycystic ovaries among features.6 PCOS is not just a fertility issue. It can affect metabolic risk, skin, hair, cycles, mood and long-term health.
Absent periods can also be a sign that the body is under-fuelled or under stress, especially with high training load, weight loss, restrictive eating or low body weight. This is not a badge of fitness. It can affect bone health, hormones and fertility. If restriction, bingeing, purging or fear of eating enough is part of the picture, ask for support early.
Red flags
Seek urgent help for very heavy bleeding with dizziness, fainting, chest pain or severe weakness; severe one-sided pelvic pain; pelvic pain with fever; positive pregnancy test with pain or bleeding; shoulder-tip pain; collapse; or symptoms of infection. Ectopic pregnancy can be life-threatening, and NHS guidance lists tummy pain low down on one side, vaginal bleeding, shoulder-tip pain and discomfort when using the toilet among possible symptoms.8
Bleeding after menopause is another red flag. NHS womb cancer guidance says the most common symptom is unusual vaginal bleeding, especially after menopause, and it should be checked.10 Most bleeding is not cancer, but it needs assessment.
Also book medical review for bleeding after sex, bleeding between periods, bleeding that starts after sex, new pelvic pain, unexplained weight loss, persistent bloating, pain during sex, or symptoms that are worsening. Do not wait years because someone once told you periods are meant to hurt.
How to prepare for your GP appointment
Track cycle dates, bleeding days, heaviness, clots, pain score, pain location, bowel and bladder symptoms, pain with sex, contraception, pregnancy possibility, fatigue, dizziness, fainting, missed work or school, and what medicines help. Bring photos of large clots or flooding if it helps explain severity, but do not feel obliged to prove your pain.
Ask for a plan that matches the symptom: pain control, bleeding control, anaemia testing, pregnancy testing, STI testing, pelvic examination, ultrasound, referral, contraception review or endometriosis pathway. Ask what happens if the first treatment does not work.
Use the health library to understand related conditions, Start Here to build a cycle timeline, All articles to check hormone claims, and the Supplement Check to list medicines and supplements before your appointment.
- Does my pattern suggest heavy menstrual bleeding, endometriosis, adenomyosis, fibroids, PCOS, infection, thyroid disease, pregnancy-related causes or something else?
- Should I have full blood count and ferritin to check for anaemia or low iron stores?
- Do I need pregnancy testing, STI testing, pelvic examination, cervical screening review or ultrasound?
- If endometriosis is possible, what is the referral route and what treatment can start while waiting?
- What symptoms mean urgent care rather than waiting for a routine appointment?
- How long should we try the first treatment before reviewing?
References
- NHS, 2024. Heavy periods. link
- NICE, 2021. Heavy menstrual bleeding: assessment and management, NG88. link
- NHS, 2025. Period pain. link
- NHS, 2024. Endometriosis. link
- NICE, 2024. Endometriosis: diagnosis and management, NG73. link
- NHS, 2025. Polycystic ovary syndrome. link
- NHS, 2024. Iron deficiency anaemia. link
- NHS, 2024. Ectopic pregnancy. link
- NHS, 2024. Pelvic inflammatory disease. link
- NHS, 2024. Womb cancer: symptoms. link
This article is educational and does not constitute medical advice, diagnosis, or a treatment recommendation. Medication uses described as “off-label” are not licensed for that purpose in the UK and should only be considered under qualified clinical supervision. Always speak to your GP, pharmacist, or a registered specialist before starting, stopping, or changing any treatment. If you have severe or alarm symptoms - unintentional weight loss, blood in your stool, difficulty swallowing, persistent vomiting, a fever, or severe pain - seek urgent medical care.