Menstrual disorders — when to see a gynecologist

Menstrual disorders are changes in the frequency, regularity, duration, or heaviness of periods, as well as unusual bleeding outside the usual cycle. Temporary fluctuations can happen — for example with stress, weight change, or a switch in contraception. When a change is significant compared with your usual pattern, keeps returning, or interferes with daily life, it deserves attention.

This article explains what is often considered a typical cycle, which signs are worth discussing with an obstetrician-gynecologist, and how a women's health consultation usually works. It does not diagnose you — it helps you decide when a visit makes sense.

What counts as a normal menstrual cycle?

Cycles are not identical for every woman. Many women do not have a cycle of exactly 28 days — and that alone does not mean there is a problem.

Cycle length is the time from the first day of one period to the first day of the next. According to the NHS, a common range is about 21–35 days. According to ACOG, cycles shorter than about 24 days or longer than about 38 days, or cycles whose length varies widely month to month, are often considered abnormal.

Period length is usually about 2–7 days. More important than any universal number is a clear change from what has been normal for you.

If your cycle used to be fairly stable and then suddenly becomes shorter, longer, heavier, or more painful, that is often a clearer reason to talk to a doctor than comparing yourself with an “average” cycle.

Which cycle changes are a reason to seek care?

Not every change means disease. These situations, however, often deserve gynecological assessment:

Painful periods

Mild to moderate discomfort around the start of a period is common. Pain should not automatically be accepted as something every woman must simply endure.

Seek assessment if:

• pain is strong and interferes with school, work, or daily activities;
• pain is new or worsening over months;
• usual measures (rest, heat, over-the-counter pain relief) are not enough;
• there is pain outside menstruation;
• there is pain during sex;
• pain comes with unusual bleeding or other new symptoms.

Severe or progressive period pain can be associated with different conditions — including endometriosis or fibroids — but only an examination can help clarify the cause.

What can the causes be?

Causes of cycle changes vary and depend on age, history, and symptoms. Possible factors include:

• hormonal changes (including around puberty and perimenopause);
• polycystic ovary syndrome (PCOS);
• thyroid disorders;
• uterine fibroids;
• polyps;
• endometriosis or adenomyosis;
• weight changes;
• stress;
• intense physical training;
• some medicines or contraceptive methods;
• pregnancy — when a period is late or missing.

When period pain should not simply be endured

Many women downplay pain with “it has always been like this for me.” If pain limits your life, that alone is reason enough to talk to a doctor.

It is wise to seek care if:

• pain interferes with normal daily life;
• pain is new or getting worse;
• pain does not respond enough to usual measures;
• there is pain outside menstruation;
• there is pain during sex;
• there are other unusual symptoms — for example very heavy bleeding, bleeding between periods, or marked fatigue.

When to seek medical help more quickly

What happens during a gynecology visit?

The visit usually starts with a conversation. Not everything below is required for every woman — the doctor decides based on your history and symptoms.

1. Conversation about your cycle and symptoms — when the change started, how heavy the bleeding is, whether there is pain, bleeding between periods, or bleeding after sex.
2. Medical history — previous conditions, surgery, pregnancy, and family history when relevant.
3. Medicines and contraception — including hormonal methods, IUDs, or medicines that affect clotting.
4. Gynecological examination — when needed, according to age and indications.
5. Ultrasound — when the doctor judges it will add useful information. More about ultrasound examinations.
6. Further tests — blood tests, cervical screening, or other investigations only when justified for your case.

If you want routine care without acute symptoms, see also what a preventive gynecological check-up includes.

How to prepare for the visit

Good preparation makes the conversation clearer:

• note when your last period started;
• if you track your cycle in an app, you can show the information;
• list unusual symptoms and when they began;
• list medicines and contraception you use;
• if there is pain — describe when it appears, how strong it is, and whether it limits daily life;
• if bleeding has changed — describe when the change began and how it compares with before;
• bring previous results if you have them.

More practical guidance is in Preparing for a gynecological exam.